Contrary to combining hot water with coffee, when cold brewing, heat is replaced by time.
Cold brewing is the process of keeping coffee grounds in cold water or room temperature water for an extended period of time – usually 12-24
Cold brewing for 12-16 hours provides a deep, rich flavor coffee extract. Beyond 20 hours the coffee can begin to become bitter as it may be a bit over extracted at this point.
For Cold brewing large/coarse ground is recommend for optimal extraction.
Depending on the ratio used Cold brewing can produce a ready to drink coffee or a coffee concentrate to be diluted when ready to drink.
Cold brew coffee can be heated, or combined with hot water, for an entirely different taste and flavor profile.