There is no one-size-fits-all answer to this question, as the steeping time for cold brew coffee will vary depending on a number of factors, including the type of coffee beans used, the grind size, and the desired strength of the brew. In general, however, most experts recommend allowing the cold brew to steep for at least 12 hours, and up to 24 hours for best results. Experimenting with different steeping times will help you find the perfect brewing method for your own personal taste.