The Big King sandwich is one Burger King's major hamburger products and has been part of its menu for more than twenty years. During its testing phase in 1996–1997, it was originally called the Double Supreme and was configured similarly to the McDonald's Big Mac—including a three piece roll. It was later reformulated as a more standard double burger during the latter part of product ... The predecessor to what is now the international fast food restaurant chain Burger King was founded in on July 23, 1953 in Jacksonville, Florida, as Insta-Burger King.Inspired by the McDonald brothers' original store location in San Bernardino, California, the founders and owners, Keith J. Cramer and his step father Matthew Burns, began searching for a concept.