Filter Stories

Freshness and Grinding, Part 1: Protecting your coffee's flavours

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Episode notes

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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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