Episoder
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For your coffee to taste its best, it’s crucial you buy fresh roasts and grind fresh.…
.….Or maybe not.
When I began creating this episode, I was convinced that ‘fresh is best’. But, after delving into the science of coffee freshness, I don’t believe that anymore.
This episode goes deep into how diffusion and oxidation changes a coffee’s flavours.
You’ll learn what it takes to store your coffee grounds unbelievably well. So well, that if you do it right, you will struggle to taste the difference between two month old coffee compared to those same beans freshly ground!
But here’s the weirdest thing: Maybe, just maybe, you will prefer old coffee more than the fresh stuff.
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Please spread the word about The Science of Coffee!
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Leave a 5 star rating on Spotify
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Explore Mahlkönig’s range of world leading grinders, trusted by baristas globally.
Dive deeper into the science of coffee freshness
Do a Certificate of Advanced Studies with the Coffee Excellence Centre
Pick up a copy of the SCA’s Coffee Freshness Handbook
Connect with my very knowledgeable guests
Samo Smrke - Instagram
19 Grams Coffee Roasters in Berlin - Instagram
Arnaldo Rodrigues - LinkedIn
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
In the last episode, I discovered that rinsing my Chemex filter papers was a waste of time! As a result I’ve managed to claw back over seven days of my life left on earth.
But why stop there?
The coffee industry is full of elaborate ways of brewing and savouring coffee: fancy drippers, cold metal balls, “slurp-able” cupping spoons.
These are very fun, but how many of them actually affect the flavour of our coffee?
I fear elaborate coffee gear is wasting our time and money. They're distracting us from the existential crises in coffee that actually require all our attention now. For example, the issue of farmers who grow delicious coffees quitting the business because it’s just getting too hard.
But to figure out whether a popular new coffee tool was actually waste of time or not, I needed to think like a scientist.
This episode is the journey I went on to rewire my brain: I had to learn what good evidence looks like, what to do if I can’t find good evidence, and why it’s important to focus mostly on experimental results while resisting the allure of a compelling theory.
Please spread the word about The Science of Coffee!
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Discover this episode’s sponsor BWT’s water filtration products. I use their Penguin magnesium filter cartridges and cafes can use their BestAqua ROC
Dive deeper into the science of slurping, water and Signal Detection Theory
Do a Certificate of Advanced Studies with the Coffee Excellence Centre
Read Georgiana’s paper on soup slurping
Learn more about Signal Detection Theory
Explore BWT White Paper on the effects of magnesium (German)
Browse Christopher Hendon’s book Water for Coffee
Take Barista Hustle's Water course
Watch James Hoffman's water video
Connect with my very knowledgeable guests
Morten Munchow - Coffee Mind website
Jeremy Nelson - LinkedIn
Samo Smrke - Instagram
Georgiana Juravle - Google Scholar
Young Baek - Instagram
Frank Neuhausen - LinkedIn
Sergio Barbarisi - LinkedIn
Alessandro Genovese - LinkedIn
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
Mangler du episoder?
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Should you rinse your filter paper before making a filter coffee? Almost everybody in coffee internet says you should.
But what if most of coffee internet was wrong?
In this episode, I show you how I try to answer this question like a professional sensory scientist would.
It’s hard. It’s frustrating. But ultimately, it’s worth it because I end up saving seven days of my life left on earth!
Please spread the word about The Science of Coffee!
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter
Leave a 5 star rating on Spotify
Follow me on Instagram and tag me in an Instagram story
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Bring out vibrancy in your coffee with BWT’s magnesium water filters for the home and cafe
Dive deeper into sensory science methodologies
Take Becky Bleibaum's free introductory sensory science course!
Set up a triangulation yourself with DragonflySci’s worksheets
Understand Rose Marie Pangborn’s three step process better with Morten Münchow (“Pangborn’s Razor”)
Do a Certificate of Advanced Studies with the Coffee Excellence Centre
Connect with my very knowledgeable guests
Morten Munchow - Coffee Mind website
Becky Bleibaum - LinkedIn
Samo Smrke - Instagram
Sophie Vo - LinkedIn
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
Farming coffee organically is amazing because soils are more alive, birds and insects are more plentiful, farmers avoid getting sick with agrochemicals.
But, if it’s so great, why is less than 10% of the world’s coffee grown organically?
The fact is, going organic is hard. Much harder than growing coffee conventionally.
In this episode I show you the story of one of Central America’s most successful organic coffee cooperatives, RAOS, and the four big hurdles that stood in the way of their early founders who all dreamed of converting their farms to organic.
This story changed my understanding of farming and is now the reason I choose organic specialty coffee whenever I can.
Please spread the word about The Science of Coffee!
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter
Follow me on Instagram and tag me in an Instagram story
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Dive deeper into organic coffee
Learn more about Sustainable Harvest’s Most Valuable Producer programme, their cupping app Tastify, and explore their range of certified organic and Fairtrade coffees
Explore RAOS (Cooperativa Regional Mixta de Agricultores Organicos de la Sierra)'s story for yourself
Are you a coffee farmer? Get in touch with Lalo Perez Varaona
Connect with my very knowledgeable guests
Lalo Perez Varaona - LinkedIn
Jorge Cuevas - LinkedIn
Andrea Futterer - GEPA website
Osman Contreras - LinkedIn
Roberto Rene Gonzales - Farm website
The Science of Coffee is made possible by these leading coffee organisations
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
The world’s farming soils are deteriorating quickly.
Conventional coffee farming where plants are grown using agrochemicals allowed farmers to reap huge harvests these last 70 years. But these agrochemicals have been at the expense of soil health.
I travel to Honduras to explore a potential solution: organic coffee farming.
Come with me as I show you the organic farming tricks of Don Rufino, one of the region’s leading organic farmers.
He nurtures the soil around his coffee trees using mountain microorganisms, a huge diversity of shade trees, attentive tree pruning, and very funky batches of homemade bug spray.
The results speak for themselves: when I pick up a handful of his soil, it is moist, dense and writhing with life.
Could these cultivation techniques be the answer to the coffee world’s declining soil health?
Please spread the word about The Science of Coffee!
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter!
Follow me on Instagram and tag me in an Instagram story
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Dive deeper into organic coffee
Explore Sustainable Harvest’s range of certified organic and Fairtrade coffees
Are you a coffee farmer? Get in touch with Lalo Perez Varaona
Check out Don Rufino’s organic cooperative, RAOS
Connect with my very knowledgeable guests
Lalo Perez Varaona - LinkedIn
Tommie Hooft van Huysduynen - LinkedIn
Alison Streaker - LinkedIn
The Science of Coffee is made possible by these leading coffee organisations
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
Roasting coffee can be maddening. Just 4° Celsius is enough to make the same green beans taste distinctly different! And there are so many things roasters can play around with: temperature, time, fan speed, drum speed, types of probes…the list goes on and on.
So, if you want to start roasting yourself, where do you start!?
In the first half of this episode, I interview one of the world's leading roasting teachers who takes me through his published scientific research to give a clear answer. It’s as simple as 80%, 15% and 5%.
And then, in the second half, I show you why roasting coffee consistently batch-after-batch is so difficult. But these problems are finally being solved with smart technologies.
I visited the ROEST engineering team in Oslo and cracked open their innovative prototype P3000 roaster to show you the technology that allows anybody to roast coffee consistently and fully automatically.
I am so impressed with these innovations, I believe they’re going to change the coffee industry.
Please spread the word about The Science of Coffee!
Follow me on Instagram and tag me in an Instagram story
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Dive deeper into the science of roasting
Explore ROEST’s innovative products for the coffee industry.
Learn more from Morten Münchow and his coffee roasting courses
Read Morten’s paper in collaboration with the University of Copenhagen on Roasting Conditions and Coffee Flavour
Connect with my very knowledgeable guests
Sverre Simonsen - LinkedIn
Callum Gilmour - LinkedIn
Veronica Balduc - LinkedIn
Morten Münchow - Coffee Mind website
Scott Rao - Instagram
The Science of Coffee is made possible by these leading coffee organisations
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
What flavours do you want from your coffee?
Every coffee bean begins its life green. And if you brewed it up without first roasting it, you’d get a yellow-green cup of grass-flavoured water.
But, as soon you apply heat to a bean, the flavour can morph to from something quite vegetative to a very acidic unripe fruit, then a very sweet fruit, and eventually dark roasted flavours.
This is the magic of coffee roasting!
In this episode of The Science of Coffee, I show you a full roast in action on the ROEST P3000, taste how coffee flavours evolve from acidic to bitter, and speak to leading coffee roasting scientists to reveal the mind-bending chemical and physical transformations taking place.
See for yourself Roest's innovative P3000 fully automatic roaster.
Please spread the word about The Science of Coffee!
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Leave a 5 star rating on Spotify
Connect with my very knowledgeable guests
Mark Al-Shemmeri - LinkedIn
Callum Gilmour - LinkedIn
Veronica Balduc - LinkedIn
Anja Rahn - LinkedInIldi Revi - LinkedIn
Samo Smrke - Instagram
Morten Münchow - Coffee Mind website
The Science of Coffee is made possible by these leading coffee organisations
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
Ever wonder why you and your friends can taste the same coffee, but you can’t agree on the flavour notes?
Join me as I explore this metaphysical mystery! I speak with leading scientists and ask: are the flavour receptors in your nose and mouth the same as mine? How does music and the shape of a cup affect what we taste? What about our different cultural backgrounds and language?
Best of all, I put all these questions to the test in the Athen’s World of Coffee trade show. Many poor unsuspecting Filter Stories spit, splutter and gasp in the name of science!
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See Marco Beverage Systems' SP9 for yourself, and discover their range of consistent and energy-efficient coffee brewers for your cafe.
Please spread the word about The Science of Coffee!
Follow me on Instagram and tag me in an Instagram story
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Leave a 5 star rating on Spotify
Connect with my very knowledgeable guests
Helene Hopfer - LinkedIn
Joel Mainland - LinkedIn
Fabiana Carvalho - Instagram
Janice Wang - LinkedIn
Felipe Reinoso - LinkedIn
Freda Yuan - Instagram
Mandy Naglich - Instagram
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
So you’ve just taken a sip of a very rare coffee, and flavours of passion fruit explode in your mouth.
But here’s the thing: that flavour of passion fruit is not coming from your mouth. It’s not even coming from your nostrils. It’s being picked up behind your eyes!
In this first episode of The Science of Coffee's second series, I unravel how our sense of smell and taste works to help you be a better coffee taster.
I shrink us down microscopically and we dive into your tongue to show you why good black coffee tastes sweet, even though there’s no sugar in it.
We then travel up into our noses and get stuck in a lot of mucus. This slime might be disgusting, but we need it to be able to smell well.
And finally, with the help of tasting expert and author Mandy Naglich, I show you three effective ways you can train yourself to be a much better coffee taster without having to go on any expensive courses. The trick is to train our internal flavour prediction models!
This episode will help you deepen your appreciation of coffee and its delicious complexity.
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See Marco Beverage Systems' SP9 for yourself, and discover their range of consistent and energy-efficient coffee brewers for your cafe.
Please spread the word about The Science of Coffee!
Follow me on Instagram and tag me in an Instagram story
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Become a better coffee taster!
Pick up a copy of Mandy Naglich’s book “How To Taste”
Sign up for the Specialty Coffee Association’s Sensory Skills courses
Do an online sensory course with CoffeeMind
Connect with my very knowledgeable guests
Mandy Naglich - Instagram
Linda Bartoshuk - Website
Joel Mainland - LinkedIn
Fabiana Carvalho - Instagram
Janice Wang - LinkedIn
Peter Giuliano - LinkedIn
Bram De Hoog - Instagram
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More
Marco Beverage Systems
ROEST
Sustainable Harvest
Mahlkönig
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories -
We're back with another series of The Science of Coffee!
Across 10 science stories, narrative audio producer and coffee professional James Harper takes you on a journey into coffee's hidden microscopic secrets.
James has spent the last year traveling to Central America, Greece, Norway, Switzerland and interviewing dozens of the world’s leading coffee scientists. This insights will help you appreciate coffee more deeply and make even better coffee at home.
We'll explore organic coffee growing, delve into the science of roasting, uncover optimal storage and grinding techniques, enhance your tasting skills through sensory science, and share James' journey towards thinking more like a scientist.
Press the Subscribe button so you don't miss future episodes! https://bit.ly/3TdDnHO
Follow James on Instagram: https://bit.ly/2Mlkk0O
The Science of Coffee is a spin-off series from James Harper's documentary podcast Filter Stories: https://bit.ly/3ajoT5e
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More
Mahlkönig
Marco Beverage Systems
Sustainable Harvest
ROEST -
America is coffee-obsessed. From Central Perk’s red couch being the centre of major plot twists in Friends to the fact the average American drank more than two cups a day.
And the conventional explanation is pretty straightforward: an English colonist introduces coffee to Jamestown in 1607. 150 years later Americans rebel against the British by throwing tea chests into Boston harbour and drinking coffee becomes their patriotic duty. Oh, and of course who won the civil war? The side that had the coffee.
But, actually, the truth is much more surprising, and reveals a much more counter-intuitive story of America.
In this final episode of Series Two of A History of Coffee, we offer you a story of America through the lens of a black drink, another black drink, a third black drink and perhaps even a fourth.
A History of Coffee is a collaboration between documentary maker James Harper of the Filter Stories coffee podcast and Jonathan Morris, Professor of History and author of ‘Coffee: A Global History’.
Don't miss future episodes by pressing the 'Subscribe' or 'Follow' button in your podcast player.
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Please spread the word about A History of Coffee!
Follow us on Instagram - Jonathan (@coffeehistoryjm) and James (@filterstoriespodcast) - and tag us in an Instagram story.
Write a review on Apple Podcasts (http://apple.co/3jY42aJ)
Leave a 5 star rating on Spotify (https://spoti.fi/3K2h4RQ)
This free educational content for the coffee community was made possible by Rancilio, manufacturers of professional Italian espresso machines for your home and coffee bar for almost 100 years
(https://bit.ly/3U3oLMz)
Read Jonathan’s book, ‘Coffee: A Global History’ (https://amzn.to/3dihAfU)
Listen to other coffee documentaries on James’ Filter Stories podcast (https://bit.ly/3ajoT5e)
Download all episodes of this second series right now by subscribing to the ‘A History of Coffee’ podcast channel (http://bit.ly/2NArChO)
Learn how Brazil massively expanded output in episode three of the first series of A History of Coffee: Coffee Catches Fire (https://bit.ly/2NArChO)
Brew up some Yaupon Holly! (https://bit.ly/40R6IuY)
Discover Deb Hunter's All Things Tudor podcast (https://bit.ly/3L5OZet) -
One morning back in the ‘80s, Howard Schultz walks out of his Milan hotel, stumbles into an espresso bar, and fundamentally changes coffee history.
He discovered (and then popularises) the iconic, timeless Italian coffee experience: Rich thick coffee, an affordable price and great theatre.
But this Italian ritual is surprisingly young, so young that Howard Schultz was in school while some of it was being developed!
In this third episode of Series Two of A History of Coffee, we show you why for most of Italy’s history, coffee was thin, expensive, dull to watch…and that’s if you were lucky enough to even be drinking the real stuff at all!
A History of Coffee is a collaboration between documentary maker James Harper of the Filter Stories coffee podcast and Jonathan Morris, Professor of History and author of ‘Coffee: A Global History’.
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Don't miss future episodes by pressing the 'Subscribe' or 'Follow' button in your podcast player
Please spread the word about A History of Coffee!
Follow us on Instagram - Jonathan (@coffeehistoryjm) and James (@filterstoriespodcast) - and tag us in an Instagram story.
Write a review on Apple Podcasts (http://apple.co/3jY42aJ)
Leave a 5 star rating on Spotify (https://spoti.fi/3K2h4RQ)
This free educational content for the coffee community was made possible by Rancilio, manufacturers of professional Italian espresso machines for your home and coffee bar for almost 100 years
(https://bit.ly/3U3oLMz)
Read Jonathan’s book, ‘Coffee: A Global History’ (https://amzn.to/3dihAfU)
Listen to other coffee documentaries on James’ Filter Stories podcast (https://bit.ly/3ajoT5e)
Download all episodes of this second series right now by subscribing to the ‘A History of Coffee’ podcast channel (http://bit.ly/2NArChO)
Go deeper into the story of espresso machines:
James' science podcast about Espresso Machine Technology
Neapolitan coffee maker (https://bit.ly/3zZCivl)
Espresso at 1906 World’s Fair in Milan (https://bit.ly/3MOX7kQ)
Rancilio's Museum, Officina Rancilio 1926 (https://bit.ly/3Q7vqTI)
"La Cornuta" espresso machine (https://bit.ly/41uBryd)
Rancilio's Berlin Showroom, the BER Rancilio Station (https://bit.ly/3mD0lNA) -
Haiti was once the biggest, most profitable coffee growing region in the world.
But today Haiti is one of the world’s poorest nations where you can’t get a bag of Haitian beans delivered to Berlin in a week for love nor money.
In this second episode of Series Two of A History of Coffee, we show you how colonialism and racism dragged Haiti into poverty, and the role of coffee at the centre of it.
Be warned: this episode contains graphic descriptions of violence.
A History of Coffee is a collaboration between documentary maker James Harper of the Filter Stories coffee podcast and Jonathan Morris, Professor of History and author of ‘Coffee: A Global History’.
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Don't miss future episodes by pressing the 'Subscribe' or 'Follow' button in your podcast player
Please spread the word about A History of Coffee!
Follow us on Instagram - Jonathan (@coffeehistoryjm) and James (@filterstoriespodcast) - and tag us in an Instagram story.
Write a review on Apple Podcasts (http://apple.co/3jY42aJ)
Leave a 5 star rating on Spotify (https://spoti.fi/3K2h4RQ)
This free educational content for the coffee community was made possible by Rancilio, manufacturers of professional Italian espresso machines for your home and coffee bar for almost 100 years
(https://bit.ly/3U3oLMz)
Read Jonathan’s book, ‘Coffee: A Global History’ (https://amzn.to/3dihAfU)
Listen to other coffee documentaries on James’ Filter Stories podcast (https://bit.ly/3ajoT5e)
Download all episodes of this second series right now by subscribing to the ‘A History of Coffee’ podcast channel (http://bit.ly/2NArChO) -
A coffee shop is a lot more than just a place to drink coffee. The seats and sofas encourage you to invite a friend, and chat.
And chatting is powerful: ideas that emerge from these caffeine-fuelled conversations give birth to modern finance and even the founding of great artistic and scientific institutions.
Meanwhile, other ideas threaten those in power, and have led to many attempts to ban coffeeshops (and even coffee itself!) these last 500 years.
In the first episode of Series Two of A History of Coffee, we show you how the coffee shop changed the world, and we ask whether it still has what it takes to upend society.
A History of Coffee is a collaboration between documentary maker James Harper of the Filter Stories coffee podcast and Jonathan Morris, Professor of History and author of ‘Coffee: A Global History’.
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Don't miss future episodes by pressing the 'Subscribe' or 'Follow' button in your podcast player
Please spread the word about A History of Coffee!
Follow us on Instagram - Jonathan (@coffeehistoryjm) and James (@filterstoriespodcast) - and tag us in an Instagram story.
Write a review on Apple Podcasts (http://apple.co/3jY42aJ)
Leave a 5 star rating on Spotify (https://spoti.fi/3K2h4RQ)
This free educational content for the coffee community was made possible by Rancilio, manufacturers of professional Italian espresso machines for your home and coffee bar for almost 100 years
(https://bit.ly/3U3oLMz)
Read Jonathan’s book, ‘Coffee: A Global History’ (https://amzn.to/3dihAfU)
Listen to other coffee documentaries on James’ Filter Stories podcast (https://bit.ly/3ajoT5e)
Download all episodes of this second series right now by subscribing to the ‘A History of Coffee’ podcast channel (http://bit.ly/2NArChO) -
We're back with more stories about the tiny psychoactive seed that changed the world and continues to shape our lives today.
In Series Two, we reveal how the invention of the coffee shop revolutionised societies, why colonialism, racism and coffee have kept once prosperous Haiti poor today, how Italy's revered espresso culture was created, and we debunk many myths around America's supposed love affair with coffee.
If we want to make coffee a more equitable industry that’s also kinder to the environment, a place to start is understanding the stories and systems that put the coffee into your cup this morning.
Press the ‘Subscribe’ button so you don’t miss future episodes. Listen to all the episodes at once on the A History of Coffee podcast channel.
A History of Coffee is a collaboration between documentary maker James Harper of the Filter Stories coffee podcast and Jonathan Morris, Professor of History and author of ‘Coffee: A Global History’.
Follow us on Instagram! Jonathan Morris @coffeehistoryjm and James Harper @filterstoriespodcast.
This free educational content was made possible with the support of Rancilio, manufacturers of professional Italian espresso machines for almost 100 years.
Join us live at the London Coffee Festival 2023! We have three time slots for you to choose from: Saturday, 22 April, 11:00-11:30 and 14:30-15:00, and Sunday, 23 April,14:30-15:00. -
Imagine you’ve got a cup of coffee in front of you. You haven’t tasted it yet. You therefore don’t know what it tastes like, right?
Wrong. Some scientists argue that you actually do know what it will taste like (more or less), and the act of tasting simply confirms what you have already imagined it will taste like. And that’s because a growing body of research is revealing that sight, sound and touch all affect your expectation of a coffee’s flavours.
In this episode, I explore how certain sounds might make your coffee taste sweeter, while other sounds translate to bitterness. And I expose how some cafe owners might be ruining the flavours of the high-end specialty coffee you paid for without even realising it.
In the second half, I show you why so many of our scientific questions about coffee are going unanswered. I take you deep into the future of coffee science by explaining who’s doing research into coffee science, why they’re doing it, how much it costs and how you can get involved.
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Please spread the word about The Science of Coffee!
Follow me on Instagram and tag me in an Instagram story
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Explore the technology behind Fiorenzato’s AllGround home coffee grinder
Get more involved in coffee science!
Buy Brita Folmer’s The Craft & Science of Coffee
Read the Specialty Coffee Association's 25 Magazine for cutting edge insights into coffee science, business and sustainability, including Charles Spence’s article on sonic seasoning
Partner with the Coffee Science Foundation
Explore Felipe Reinoso Carvalho’s sonic research, including Diego Campos’ winning World Barista Championship routine
Apply to study at the UC Davis Coffee Centre
Do an online course with ZHAW’s Coffee Excellence Centre
Subscribe to Barista Hustle and complete their online coffee courses
Become a member of the Barista Guild, Coffee Roaster’s Guild, Coffee Technicians Guild and attend their events!
Connect with my very knowledgeable guests
Charles Spence - Academic profile
Fabiana Carvalho - Instagram
Janice Wang - LinkedIn
Felipe Reinoso Carvalho - LinkedIn
Chahan Yeretzian - LinkedIn
Bill Ristenpart - Academic profile
Peter Giuliano - LinkedIn
Jenn Rugolo - LinkedIn
Giulia Bagato - LinkedIn
Denis Girardi - LinkedIn
The Science of Coffee is made possible by these leading coffee organisations
BWT Water and More
Marco Beverage Systems
Trabocca
Eversys
Oatly
Fiorenzato -
When was the last time you picked up a cappuccino with a mountain of foam perched on top? Maybe these are the cappuccinos you make every morning at home.
I personally really, really dislike them! The foam is cold, raspy, and gets in the way of the actual coffee liquid.
How much better would your mornings be if, instead, your cappuccino had that creamy, silky “microfoam” you find in a specialty coffee cafe?
In this episode, I take you deep into the bubbles of latte foam to show you what makes them, what destroys them, and how you can craft mouth-melting lattes.
Along the way I also settle the big debate: what is the actual difference between regular Oatly and Oatly Barista Edition!?
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Please spread the word about The Science of Coffee!
Follow me on Instagram and tag me in an Instagram story
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Leave a 5 star rating on Spotify
Try Oatly Barista Edition (this episode’s sponsor) for yourself
Go deeper into latte foam science!
Measure your latte foam’s bubble size!
Marvel at tetrakaidecahedra foam for yourself
Check out Steven Abbott’s brilliant science website
Learn how to create microfoam with Lance Hedrick
Study milk science with Barista Hustle’s online courses
Connect with my very knowledgeable guests
Steven Abbott - website
Rituja Upadhyay - LinkedIn
Nidhi Bansal - LinkedIn
Thom Huppertz - LinkedIn
Sofia Eldhe - LinkedIn
Toby Weedon - LinkedIn
The Science of Coffee is made possible by these leading coffee organisations
BWT Water and More
Marco Beverage Systems
Trabocca
Eversys
Oatly
Fiorenzato -
A good espresso is a sublime experience: rich, sweet, and wonderfully caffeinated.
But, who woke up one morning and thought to themselves, ‘I’m going to build a contraption that forces a tiny amount of super hot water with incredible pressure through a bed of very finely ground coffee’?
Well, the fact is, the first “espresso” machine built 150 years ago was awful in almost every way. Worst of all, if you gave that coffee to anybody on the street, nobody would say it’s even an espresso!
But, over the decades, problems begat solutions that begat more problems that culminated in espresso machines like Eversys that produce gorgeous espressos at just the push of a button.
And it’s got me wondering: what is the perfect espresso machine? How far can we go?
But, before clicking play, be warned: this story gets explosive and bloody!
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Leave a 5 star rating on Spotify
Learn more about how Eversys espresso machines (this episode’s sponsor) produce high quality espressos
Listen to my A History of Coffee podcast series with Prof. Jonathan Morris
Pictures of the espresso machines featured in this episode
Angelo Moriondo (1884, “Big water boiler with gnarly bits”)
La Pavoni Ideale (1905, "Fire hydrant")
Gaggia Tipo Classica (1947, “Lever”)
Faema E61 (1961, “Retro 60s toaster”)
Eversys (2022, “push button”)
Want to go deeper into espresso machine technology?
Coffee Technician Guild’s Educational Courses
Barista Hustle’s The Espresso Machine course
Read Prof. Jonathan Morris’ book ‘Coffee: A Global History’
Do your own coffee museum tour in Italy!
MUMAC (Milan)
Rancilio Officina 1926 (Milan)
Accademia del Caffè Espresso (Florence)
Connect with my very knowledgeable guests
Jonathan Morris - Instagram
Hylan Joseph - LinkedIn
Giorgio Rancilio - LinkedIn
Anna Cento - LinkedIn
Carlos Gonzàlez - LinkedIn
Silvia Bartoloni - LinkedIn
Jonathan Besse - LinkedIn
The Science of Coffee is made possible by these leading coffee organisations
BWT Water and More
Marco Beverage Systems
Trabocca
Eversys
Oatly
Fiorenzato -
How can you make better coffee at home? Well, an easy way is to buy higher quality beans.
But, I’m concerned this is going to get harder and harder for you in the future.
Climate change is making coffee taste worse while also pushing farmers into financial hardship.
In this episode we explore how genetic development can produce a coffee tree that might save the day. Is there a wild coffee tree happily growing in the forests somewhere that could be our silver bullet? What about if we mix existing documented species together?
But, the big problem is that genetic research is slow, and farmers can’t wait around. So, in the second half, we learn how coffee farmers in Kenya are trying to fix the problem right now.
And I’m actually tentatively hopeful the beans you brew in the morning are not going to get worse. But, it all depends on you, me and the coffee industry making a couple of changes right now.
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Please spread the word about The Science of Coffee!
Follow me on Instagram and tag me in an Instagram story - https://bit.ly/2Mlkk0O
Write a review on Apple Podcasts - https://apple.co/3sf87MV
Leave a 5 star rating on Spotify - https://spoti.fi/3yHkjcV
Learn more about how Trabocca, this episode’s sponsor, works with coffee farmers: https://bit.ly/3Tjn8bV
Support the work of World Coffee Research: https://bit.ly/3VtyoV6
Become a member of Kew Gardens: https://bit.ly/3yFZ8b0
Find some of Alvans Mutero’s (https://bit.ly/3T0NHTy) and Thiriku’s (https://bit.ly/3CCxHQJ) coffee to taste for yourself
Learn more about cloning coffee plants on my other podcast, Adventures in Coffee - https://bit.ly/3EFBmzG
Want to listen to more documentary podcasts about coffee? Check out Filter Stories - https://bit.ly/3zb5vnO
Connect with my very knowledgeable guests:
Sarada Krishnan - LinkedIn (https://bit.ly/3rW9dwB) and Research Gate (https://bit.ly/3VvzDTq)
Aaron Davis - Kew Gardens (https://bit.ly/3CAicZg)
Hanna Neuschwander - LinkedIn (https://bit.ly/3MvW2Mi)
Bernard Gichimu - LinkedIn (https://bit.ly/3VrOIFJ)
Learn more about the coffee varieties discussed on this episode:
SL 28 - https://bit.ly/3MvNIw6
SL 34 - https://bit.ly/3rTX2QX
Ruiru 11 - https://bit.ly/3CXmDPf
Batian - https://bit.ly/3EEls8M
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More - https://bit.ly/3EEpuxN
Marco Beverage Systems - https://bit.ly/3T2YDzY
Trabocca - https://bit.ly/3Tjn8bV
Eversys - https://bit.ly/3CBkp6X
Oatly - https://bit.ly/3exvlKS
Fiorenzato - https://bit.ly/3T3nmUQ -
How you brew your coffee dramatically affects what you taste. And I do mean dramatic! Brewing up the same bag of coffee beans can taste like a slice of heaven, or a slap in the face.
So, what exactly is happening at a microscopic level when water swirls through coffee grinds? Why does boiling water extract certain flavours, while letting the kettle cool for five minutes make it taste markedly different?
In this episode, we dive deep into the academic research conducted at the UC Davis Coffee Center so you can choose your flavour adventure: Do you like your coffees when they’re a sour bomb? A floral caress on the lips? A smokey drag on a pipe? Or a treacle of sweet syrup?
We also explore why it can be so difficult getting the same flavours from the same beans consistently. And finally, I equip you with tools so you can begin finding your perfect brew.
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Please spread the word about The Science of Coffee!
Follow me on Instagram and tag me in an Instagram story - https://bit.ly/2Mlkk0O
Write a review on Apple Podcasts - https://apple.co/3sf87MV
Leave a 5 star rating on Spotify - https://spoti.fi/3yHkjcV
Explore this episode’s sponsor Marco Beverage Systems SP 9 brewer and how it delivers consistent brews in the cafe (https://bit.ly/3Tgh18r)
Listen to the Adventures in Coffee episode about making dramatically different brews using the Aeropress: https://bit.ly/3TghsQ7
Want more to listen to more documentary podcasts about coffee? Check out Filter Stories - https://bit.ly/3zb5vnO
Want to go deeper into coffee extraction?
Mackenzie Batali’s fractionation research - https://bit.ly/3CFnvH0
UC Davis’ brewing control chart research - https://bit.ly/3CLoiGz
Take courses on coffee brewing with the Specialty Coffee Association - https://bit.ly/3EQFoVV
Study at the UC Davis Coffee - https://bit.ly/3TwSgod
Read ‘The Craft and Science of Coffee’ - https://bit.ly/3zb7bN8
Connect with my very knowledgeable guests:
Samo Smrke - LinkedIn (https://bit.ly/3EKrjtg) and Instagram (https://bit.ly/3IdrfRz)
Bill Ristenpart - Academic profile (https://faculty.engineering.ucdavis.edu/ristenpart/)
Mackenzie Batali - LinkedIn (https://bit.ly/3s7VRxr)
Peter Giuliano - LinkedIn (https://bit.ly/3yT66tv)
Danny Pang - LinkedIn (https://bit.ly/3Sd9mqq)
David Walsh - LinkedIn (https://bit.ly/3VEH7Uo)
The Science of Coffee is made possible by these leading coffee organisations:
BWT Water and More - https://bit.ly/3EEpuxN
Marco Beverage Systems - https://bit.ly/3T2YDzY
Trabocca - https://bit.ly/3Tjn8bV
Eversys - https://bit.ly/3CBkp6X
Oatly - https://bit.ly/3exvlKS
Fiorenzato - https://bit.ly/3T3nmUQ - Se mer
