Postum was a powdered roasted grain beverage sold by the Kraft Foods company as a coffee substitute. The caffeine-free beverage mix was created by Postum Cereal Company founder C. W. Post in 1895 and produced and marketed by Postum Cereal Company as a healthful alternative to coffee. Postum was made from wheat bran, wheat, molasses, and maltodextrin from corn. Post was a student of Dr. John Harvey Kellogg who believed caffeine was unhealthy. It was discontinued in 2007.

Postum enjoyed a rise in sales and popularity in the U.S. during World War II, as coffee became heavily rationed and people searched for a replacement.