The Big Mac was created by Pittsburgh franchisee Jim Delligatti and introduced nationally by McDonald’s in 1968.
Delligatti developed the sandwich as a larger, more substantial hamburger for customers seeking a filling meal. Its two beef patties, special sauce, lettuce, cheese, pickles, onions, and three-part sesame-seed bun gave it a distinctive structure and identity.
The sandwich’s branding relied heavily on its memorable name and recognizable composition. McDonald’s later made the Big Mac one of its signature global products, supported by advertising, packaging, and menu imagery.
The Big Mac should not be confused with the Quarter Pounder, whose defining feature is the stated pre-cooked weight of its beef patty. The two sandwiches belong to different product-branding histories.