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Heads-up for anyone who treats their brewer like a sacred appliance: a major recall tops this week’s roundup. Also inside: international moves and a tiny science experiment that wants to serenade your espresso.
Roast level and caffeine content aren’t the same thing: darker roasts taste stronger because of caramelized sugars and roasted flavors, but they typically contain slightly less caffeine by volume than lighter roasts. So if you want a serious caffeine kick, a well-roasted light or medium roast can out-perk a deep-dark roast.