Fee Brothers Aztec Chocolate Bitters is from Fee Brothers, a family-owned company founded in 1863 in New York. Fee Brothers survived Prohibition by using glycerin as an alternative to alcohol to make bitters. Inspired by the Aztecs, who used cacao beans and peppers to liven their drinks, Fee Brothers Aztec Chocolate Bitters is best mixed with dark spirits like whisk(e)y or rum. A sweetening and bittering agent. Try it in a Rum Old Fashioned.