'flavored coffee' on Serious Eats

The Dark Side of Flavored Coffee

The concept is a traditional way of making bad coffee taste better, and at times in history when only lower quality coffees were easy to access, flavored blends seemed like a luxury. In general, coffee flavoring contains flavor compounds mixed with a solvent like propylene glycol (popularly used in pharmaceuticals, and airplane de-icing compound!) in order to attach the flavor chemicals to the beans. More

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