Who invented the Big Mac while operating a McDonald’s franchise in Pennsylvania?

Jim Delligatti invented the Big Mac while operating a McDonald’s franchise in Pennsylvania.

Delligatti wanted a larger sandwich for customers who found the standard hamburger too small. He developed a three-part bun with two beef patties, lettuce, cheese, pickles, onions, and sauce. The sandwich was first sold in the Pittsburgh area before McDonald’s adopted it more broadly.

The Big Mac’s distinctive middle bun helped support its height and separate the two patties. Its special sauce and layered presentation became central parts of the product’s identity, making the sandwich useful as both a menu item and a branding symbol.

The sandwich was originally called the “Big Mac” after a naming suggestion from a McDonald’s advertising secretary. Delligatti is sometimes overlooked because the product became associated with the entire corporation rather than with its franchise creator.