Ultrasonic coffee-maker produces the perfect cold brew in minutes
Cold-brewing coffee can reduce its bitter taste, but it normally takes up to 24 hours as the grounds slowly steep. A new method that involves pummelling the grounds with ultrasound can drastically speed up the process
Cold-brewing coffee can reduce its bitter taste, but it normally takes up to 24 hours as the grounds slowly steep. A new method that involves pummelling the grounds with ultrasound can drastically speed up the process
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