Which burger chain introduced the Baconator in 2007?

Wendy's introduced the Baconator in 2007.

The Baconator is a signature Wendy's hamburger built around two beef patties, American cheese, and bacon. Its launch made bacon the central selling point rather than a minor optional topping. The sandwich is typically finished with mayonnaise and ketchup and served in a bun, although menu details and portion sizes have changed over time.

Wendy's was founded in Columbus, Ohio, by Dave Thomas in 1969. The company became known for square beef patties, a feature that distinguishes many of its hamburgers from the round patties used by most major competitors. The Baconator kept that recognizable square-patty format while adding a deliberately rich bacon-and-cheese profile.

The name is sometimes confused with other bacon-heavy burgers sold by competing chains. The specific branded sandwich called the Baconator belongs to Wendy's. It also has had related versions, including smaller or chicken-based variations in some markets, so the original product name should not be treated as a single unchanging recipe everywhere.