A century-old barbecue restaurant has its top-secret barbecue sauce recipe locked in a bank vault

McClard's Bar-B-Q is famous for serving Bill Clinton and its top-secret sauce recipe. Lolo A./Yelp McClard's has kept its barbecue sauce recipe in a bank vault for decades. The Arkansas barbecue restaurant has been family-owned since 1928. Bill Clinton once had McClard's ribs flown to the White House. Some family recipes are tucked away in a kitchen drawer or written down in a dusty recipe book. At McClard's Bar-B-Q in Arkansas, one family recipe is considered so valuable that it's locked a...