The Egg McMuffin, created in 1972, became McDonald’s signature breakfast brand.
Herb Peterson, a McDonald’s franchisee in Santa Barbara, California, developed the sandwich. Its basic combination of a toasted English muffin, egg, Canadian bacon, and cheese offered a portable alternative to traditional breakfast foods and fit the restaurant’s fast-service model.
The sandwich first appeared as a local innovation before McDonald’s expanded breakfast more broadly. It is often mistaken for the later Sausage McMuffin or the McGriddle, but those are separate breakfast products introduced in different periods.
The Egg McMuffin was important to McDonald’s branding because it gave the company a distinctive breakfast item that customers could identify by name. It also helped establish breakfast as a major daypart for the chain, rather than a limited or occasional menu category.