KC Masterpiece is a barbecue sauce that claims to be the number 1 premium barbecue sauce sold in the United States.The sauce was test marketed by Rich Davis, who was a child psychologist, in 1977 in Kansas City, Missouri as K.C. Soul Style Barbecue Sauce.The sauce, which originally started with only five ingredients, sold more than 3,000 cases. Davis renamed it KC Masterpiece. During this same time, he also test marketed Muschup (a combination of ketchup and mustard) and Dilled Muschup.In 1986 he sold the sauce to the Kingsford charcoal division of the Clorox company, which took the barbecue sauce nationwide. Currently it is the number 1 selling premium barbecue sauce in the country. He retained rights to use the sauce at restaurants he was to develop. Of the five restaurants opened, only the one in Overland Park, Kansas remains.