A Whataburger “throwback” is ... It’s made with two beef patties topped with Swiss cheese, au jus sauce and “a generous layer” of grilled mushrooms, all served on a toasted bun, a ...

Whataburger’s Mushroom Swiss Burger is back! A toasted bun holds two beef patties, melted Swiss cheese, grilled mushrooms, and creamy sauce. Bold text highlights the burger’s return.

they belong in your hands," Whataburger President and CEO Debbie Stroud said in a release. This burger has two grilled all-beef patties, melty Swiss cheese, creamy au jus sauce, and a layer of ...

It’s made with two beef patties topped with Swiss cheese, au jus sauce and “a generous layer” of grilled mushrooms, all served on a toasted bun, a product description says. Whataburger’s ...