The Japanese Flash-Chill Method If you find that your iced coffee often tastes hollow, bitter, or watered down, you aren't alone. Traditional iced coffee—which is just hot coffee left to cool down—suffers from oxidation, which kills the delicate floral and fruity notes we love. Enter Flash-Chilling (also known as Japanese-style iced coffee). By brewing hot coffee directly onto ice, you "lock in" the aromatics instantly before they have a chance to disappear. The result? A cri