Coffee Roasting, Part 1: How heat transforms coffee beans

Coffee Roasting, Part 1: How heat transforms coffee beans

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 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 Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here. How does Perfect Moose detect what kind of milk is in the pitcher? Click here to find out. What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off. What does the Marco MilkPal look like to you? WALL-E? Something Steve Jobs would be proud of? Check it out here.

Episoder(74)

Getting great water for coffee, step-by-step. Part 1: Alkalinity, hardness and why it matters

Getting great water for coffee, step-by-step. Part 1: Alkalinity, hardness and why it matters

Water massively impacts your coffee’s flavours. But most of us struggle to fix our water because water science is confusing…   …until now! In this special collaboration with Lucia Solis (Making Coffee...

14 Jul 202526min

Farm to port: why specialty costs more

Farm to port: why specialty costs more

Every time we open a bag of beautiful specialty coffee — like Erick Bravo’s from Finca El Chaferote in Huila, Colombia — we’re drinking something that’s been on a long journey.   And I mean long! Ove...

23 Jun 202554min

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

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

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 i...

9 Jun 202546min

The hard business of selling beautiful coffee, part 2

The hard business of selling beautiful coffee, part 2

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 inst...

19 Mai 202539min

The hard business of selling beautiful coffee, part 1

The hard business of selling beautiful coffee, part 1

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 inst...

19 Mai 202529min

The Speed of Heat: How to roast more coffee, faster!

The Speed of Heat: How to roast more coffee, faster!

To roast coffee faster, you need to turn up the heat….right?   No!    In this episode, we explore the three powerful methods of heat transfer that revolutionised roasting. We’ll journey from humble be...

24 Mar 202552min

Coffee Roasting: How baby plant food transforms into delicious coffee flavours

Coffee Roasting: How baby plant food transforms into delicious coffee flavours

A mother coffee plant gifts its baby everything it needs to grow—a green seed packed with food. But when we roast coffee, we hijack that gift and turn it into something else: flavor.   But what is fla...

10 Mar 202547min

Fruit juice or creamy almonds? Your guide to controlling cold brew flavors

Fruit juice or creamy almonds? Your guide to controlling cold brew flavors

When I started making cold brew this last year, I treated it like hot brew filter coffee. But no matter how I adjusted the grind or tweaked the brew time, I hardly got any differences in flavor…   The...

16 Feb 202546min

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