Which fast-food chain created the Big Mac hamburger in 1967?

McDonald's created the Big Mac hamburger in 1967.

The sandwich was developed by Jim Delligatti, a McDonald's franchisee in the Pittsburgh area. He tested a larger, two-beef-patty sandwich with a middle bun section to make it more substantial than the chain's regular hamburgers. McDonald's introduced it nationally in the United States in 1968.

The Big Mac is known for its sesame-seed bun, two beef patties, lettuce, cheese, pickles, onions, and special sauce. Its three-part bun is one of its most recognizable features.

People sometimes confuse the Big Mac's launch date with its national rollout date. It first appeared in 1967 in selected restaurants, while the wider United States launch followed in 1968. The sandwich later became one of McDonald's best-known products worldwide.