The Cool Chemistry Behind The Flavor Of Cold-Brew Coffee | @curiositydotcom
Although they might look the same, iced and cold-brew coffee are made in very different ways. Iced coffee involves brewing coffee hot, then either cooling it down slowly or pouring it over ice to chill it more quickly. Cold brew, as the name implies, involves brewing the coffee in cold water. As UCLA’s Science and Food blog puts it, “Hot brew quickly produces fragrant java with bite and acidity, whereas cold brew rewards patience with condensed coffee that is smooth and sweet.” Coffee takes longer to brew cold than hot because heat speeds up chemical reactions—a principle that’s at play in the flavor differences, as well.