Which McDonald's breakfast sandwich was created by franchisee Herb Peterson?

The Egg McMuffin was created by McDonald's franchisee Herb Peterson.

Peterson developed the sandwich in the early 1970s at his McDonald's restaurant in Santa Barbara, California. Its defining combination was a toasted English muffin, a cooked egg, Canadian bacon, and cheese, creating a portable breakfast product with a distinctive name and format.

The sandwich helped establish McDonald's breakfast branding. It was introduced nationally in 1975, after being tested and refined, and it became closely associated with the company's expansion into morning service.

A frequent mix-up is the launch date: the Egg McMuffin was created and tested before its national rollout. It is also not the same product as the Sausage McMuffin, which uses sausage instead of Canadian bacon.