we've often pondered how the good doctor gets the peculiar taste. We've heard it's prune juice. We've heard it's grape juice. We've even heard it's a top-secret combination of ingredients that only a few people know.

Dr. Pepper is the oldest major soft drink in the U.S. It was first made and sold in 1885 in Waco, Texas. Dr. Charles Pepper, is the namesake for the drink. The formula for Dr Pepper is proprietary, but prune juice is definitely not one of the ingredients. It is a blend of many spices and flavor extracts. The color is supplied by caramel especially made for the product.