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. See the Mikafi countertop roaster at the Thermoplan stand (6637) at World Of Coffee Brussels. Not attending? See it here. What does the Marco MilkPal look like to you? WALL-E? Something Steve Jobs would be proud of? Check it out here.

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Guatemala's Inconvenient Truth, Part 2: Who does specialty serve?

Guatemala's Inconvenient Truth, Part 2: Who does specialty serve?

Specialty coffee changes the story for the indigenous people of Guatemala. Coffee as a tool of oppression finally offers hope....and then something a bit more complicated.   This episode explores the ...

20 Huhti 28min

Guatemala's Inconvenient Truth, Part 1: Whose land is it anyway?

Guatemala's Inconvenient Truth, Part 1: Whose land is it anyway?

When you buy a bag of coffee labelled fifth-generation family farm, it feels like a good choice.    But in Guatemala, that label might actually be a signal for a more uncomfortable truth.   This episo...

20 Huhti 43min

Surrogates: Anything but the coffee

Surrogates: Anything but the coffee

What happens when coffee disappears?   This is not a thought experiment! It’s happened many times in history: War, blockades, tariffs, ideology, health panics, sanctions, supply shocks.    When coffee...

2 Maalis 46min

Mother Coffee: The history and heritage of Ethiopia's wild coffee forests

Mother Coffee: The history and heritage of Ethiopia's wild coffee forests

Most coffee is grown on vast plantations using machines, pesticides and fertilisers.    But in Ethiopia, coffee grows wild in humid forests surrounded by birds.    And that wild coffee matters more th...

9 Helmi 48min

We Built This City…On Coffee: Hamburg and the making of Europe's coffee trade

We Built This City…On Coffee: Hamburg and the making of Europe's coffee trade

On a long walk through Hamburg, somewhere between the fish markets and giant cranes, you might stumble a giant bronze coffee bean looks like its crash landed from space.    But this giant coffee bean ...

5 Tammi 50min

Introducing: Series Three of A History of Coffee

Introducing: Series Three of A History of Coffee

We’re back with more stories about the tiny psychoactive seed that changed the world and continues to shape our lives today. Is it possible to follow the story not just to Ethiopia, not just to a sin...

29 Joulu 20252min

Coffee Quality, Part 3: When the “quality” myth hits the farm

Coffee Quality, Part 3: When the “quality” myth hits the farm

For twenty years, the 2004 cupping form profoundly shaped the specialty coffee world.   But on the hillsides of coffee farms, some of the form’s byproducts have been disadvantaging producers.    In th...

8 Joulu 202530min

Coffee Quality, Part 2: How “quality” became a myth

Coffee Quality, Part 2: How “quality” became a myth

If you ask two specialty professionals what makes a high-quality coffee, you’ll likely get a surprisingly consistent answer: clean, sweet, juicy, bright. To an outsider, they would be forgiven for thi...

8 Joulu 202525min

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