Cold brew is a method of making coffee that involves steeping coarsely ground coffee beans in cold water for an extended period, typically 12 to 24 hours. This process results in a smooth, less acidic coffee concentrate that can be diluted with water or milk before serving. Unlike traditional brewing methods that use hot water, cold brew extracts flavors more slowly, leading to a different taste profile. It is often served over ice and can be enjoyed plain or flavored, making it a popular choice, especially during warmer months.