The Science of Coffee – Détails, épisodes et analyse

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The Science of Coffee

James Harper

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Société & Culture

Fréquence : 1 épisode/39j. Total Éps: 26

The Science of Coffee is a journey into coffee’s hidden microscopic secrets to help you make even better coffee at home. Documentary maker and coffee professional James Harper travels the world and speaks with leading coffee scientists to help you appreciate coffee more deeply. You are going to get taken into the science of water, coffee extraction, plant genetics, espresso technology, latte foam, sonic seasoning, our sense of taste and smell, organic farming, roasting, grinding and freshness, and how to think like a scientist. Press the Subscribe button so you don’t miss future episodes! The Science of Coffee is a spin-off series from James Harper’s documentary podcast Filter Stories. Follow James on Instagram: https://bit.ly/2Mlkk0O Listen to Filter Stories: https://bit.ly/3ajoT5

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Why one Colombian farmer chose specialty, and the other walked away

Saison 3 · Épisode 7

lundi 9 juin 2025 • Durée 46:45

I travel to Colombia’s Huila region to answer a question that’s puzzled me for years: if specialty coffee pays more, is better for the environment, and brews tastier cups—why don’t more farmers grow it?

I speak with two producers in the same region whose choices couldn’t be more different. One stakes his future on specialty. The other opts out.

Their decisions come down to more than passion or a hard work ethic. Instead, I uncover two starting conditions—often invisible to us buyers—that strongly shape whether a farmer chooses specialty at all.

If we want to see more speciality coffee grown, we need to bring down the barriers to specialty. But first we need to understand what those barriers really are.

The answers might surprise you. They surprised me.

Please spread the word about The Science of Coffee! Leave a 5 star rating on Spotify Follow me on Instagram and tag me in an Instagram story Write a review on Apple Podcasts

Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter

Find your next favourite Colombian coffee from The Coffee Quest

Taste coffees from Erick Bravo’s award winning farm, Finca El Chaferote

Nerd out on my farm profitability estimations

Season 3 of The Science of Coffee is made possible by these leading coffee organizations:

The Coffee Quest | BWT | TODDY | Algrano | Probat

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The hard business of selling beautiful coffee, part 2

Saison 3 · Épisode 6

lundi 19 mai 2025 • Durée 39:02

Volume. Cheap. Lame flavours. This is the traditional way of growing coffee in Brazil, and almost every farm does it this way.

But what if you wanted to produce beautiful, distinctive flavours instead—and make a living from it?

In this episode, we travel to Fazenda Paraíso in Minas Gerais, Brazil, where farmer Vicente Pereira and his daughter are on a steep learning curve finding buyers for their beautiful coffees.

Part 2 explores what it looks like for a small Brazilian farm to find better buyers, and the challenge of achieving pricing power.

Behind every beautiful coffee is a family story like this, but it’s a story we rarely get to see close up.

Let’s take a closer look.

Please spread the word about The Science of Coffee! Leave a 5 star rating on Spotify Follow me on Instagram and tag me in an Instagram story Write a review on Apple Podcasts

Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter

Source your next lot of specialty green coffee on Algrano

Listen to Firefly to hear a cautionary tale about a specialty farm failing because they couldn't find the right buyers.

What Is Good Science? Part 2: How to think like a scientist

Saison 2 · Épisode 8

lundi 8 avril 2024 • Durée 55:15

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! 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 Write a review on Apple Podcasts 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 Learn more about Explore on the effects of magnesium (German) Browse Christopher Hendon’s book Take Watch James Hoffman's Connect with my very knowledgeable guests Morten Munchow - Jeremy Nelson - Samo Smrke - Georgiana Juravle - Young Baek - Frank Neuhausen - Sergio Barbarisi - Alessandro Genovese - The Science of Coffee is made possible by these leading coffee organisations: is a spin-off series from James Harper's documentary podcast Subscribe to podcast

What Is Good Science? Part 1: How to brew coffee like a scientist

Saison 2 · Épisode 7

lundi 25 mars 2024 • Durée 46:21

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 storyhttps://apple.co/3jWYtxq Write a review on Apple Podcasts 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 - Becky Bleibaum - Samo Smrke - Sophie Vo - The Science of Coffee is made possible by these leading coffee organisations: is a spin-off series from James Harper's documentary podcast Subscribe to podcast

Organic Coffee, Part 2: Why don’t we see more organic coffee farms?

Saison 2 · Épisode 6

mercredi 13 mars 2024 • Durée 41:22

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 storyhttps://apple.co/3jWYtxq 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 - Jorge Cuevas - Andrea Futterer - Osman Contreras - Roberto Rene Gonzales - The Science of Coffee is made possible by these leading coffee organisations is a spin-off series from James Harper's documentary podcast Subscribe to podcast

Organic Coffee, Part 1: The magic of soil

Saison 2 · Épisode 5

lundi 26 février 2024 • Durée 38:49

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! https://bit.ly/2Mlkk0O Follow me on Instagram and tag me in an Instagram storyhttps://apple.co/3jWYtxq 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 - - Alison Streaker - The Science of Coffee is made possible by these leading coffee organisations is a spin-off series from James Harper's documentary podcast Subscribe to podcast

Coffee Roasting, Part 2: Roasting made easy

Saison 2 · Épisode 4

lundi 12 février 2024 • Durée 46:20

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! https://bit.ly/2Mlkk0O Follow me on Instagram and tag me in an Instagram storyhttps://apple.co/3jWYtxq 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 - Callum Gilmour - Veronica Balduc - Morten Münchow - Scott Rao - The Science of Coffee is made possible by these leading coffee organisations is a spin-off series from James Harper's documentary podcast Subscribe to podcast

Coffee Roasting, Part 1: How heat transforms coffee beans

Saison 2 · Épisode 3

lundi 29 janvier 2024 • Durée 37:42

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! Follow me on Instagram and tag me in an Instagram story Write a review on Apple Podcasts 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 is a spin-off series from James Harper's documentary podcast Subscribe to podcast

Smell and Taste, Part 2: Are you and me tasting the same flavours?

Saison 2 · Épisode 2

lundi 15 janvier 2024 • Durée 39:19

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! --------- 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 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: is a spin-off series from James Harper's documentary podcast Subscribe to podcast

Smell and Taste, Part 1: How to be a better coffee taster

Saison 2 · Épisode 1

lundi 8 janvier 2024 • Durée 44:33

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. --------- 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 - Linda Bartoshuk - Joel Mainland - Fabiana Carvalho - Janice Wang - Peter Giuliano - Bram De Hoog - The Science of Coffee is made possible by these leading coffee organisations: is a spin-off series from James Harper's documentary podcast Subscribe to podcast

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The Science of Coffee – Détails, épisodes et analyse

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