The Big Mac gave McDonald’s its first national signature sandwich in 1968.
Jim Delligatti, a McDonald’s franchisee in the Pittsburgh area, created the sandwich by adding a third bun layer and a larger combination of ingredients than the standard hamburger. McDonald’s introduced it nationally in 1968 after regional testing and customer interest.
The sandwich’s two beef patties, special sauce, lettuce, cheese, pickles, onions, and sesame-seed bun became a distinctive part of McDonald’s product identity. Its name was short, memorable, and easy to use in advertising, making it a branding asset as well as a menu item.
The Big Mac is sometimes confused with the Quarter Pounder, which uses a larger single beef patty, or the earlier Filet-O-Fish. The Big Mac’s importance is that it became a globally recognized signature product for McDonald’s.