Why coarse grounds are best for cold brew

Although it might seem unusual to opt for a coarse grind setting when preparing your coffee, this choice is key to achieving the smooth and luxurious cup that cold brew enthusiasts desire. "Grinding coffee very finely compared to coarsely actually increases the total surface area exposed to water, as it creates more particles," explains Taylor Young. In the cold brew process, using fine coffee grounds doesn't result in more caffeine; instead, it leads to an overly saturated cup with intensely sour flavors.
Therefore, when you're unsure, choose a coarser grind the next time you make a cold brew. (Tip: If you lack a grinder, a food processor can serve the same purpose.) Whether you're aiming for a smooth variation of an espresso martini or a refreshing morning beverage, simply switching from a fine grind to a coarse one should enhance the flavor of your cold brew.
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