A1 Steak Sauce
A.1. is a steak sauce in the United States, marketed as a condiment for use with meat or game dishes. It was developed, produced, and marketed in the United Kingdom as a brand in 1831 and was later introduced to the United States by G.F. Heublein & Bros., and was officially registered as a trademark in the U.S. in 1895. Widely available in the U.S. and Canada, the sauce today is only available from Tesco and Ocado in the UK, its country of origin.