The McDonald’s product name created by combining “Big” with “Mac” in 1967 was Big Mac.
The Big Mac was created by Jim Delligatti, a McDonald’s franchisee in the Pittsburgh area. It used two beef patties, a middle bun section, cheese, lettuce, pickles, onions, and the sauce that became strongly associated with the sandwich.
The sandwich was first sold in the United States in 1967 and became a national menu item the following year. Its name quickly became one of McDonald’s strongest product brands, separate from the company’s broader restaurant name.
The Big Mac is sometimes confused with later sandwiches whose names also use “Big.” Big N’ Tasty was a different McDonald’s product, while Big King was associated with Burger King rather than McDonald’s.