Big Mac
The Big Mac – a signature product that was introduced in 1967. The Big Mac consists of two (approx. uncooked weight) ground beef patties, special Big Mac sauce, lettuce, cheese, pickles, and diced onions in a sesame seed bun, with an additional middle bun (called a "club layer") separating the beef patties. The Grand Mac, its bigger-sized counterpart, was added in January 2017, and January 2019 saw the Bacon Big Mac debut.