Why do we roast coffee?
Chemistry For Your Life
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You Love the Flavor of Coffee
There are hundreds of different molecules in coffee, but only around 30 have been identified that contribute significantly to the flavor of coffee. As those reactions proceed, the coffee gets darker and darker, which is why it's called a medium roast or dark roast. And i will say, when the coffee bean cracks, even in the second crack, oftentimes that's when the aromatic molecules are released,. giving the classic coffee flavor.
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