Solly's Grille is a Glendale, Wisconsin diner[1] thought to be the creator of the butter burger.
[2] The Fieber family has owned the restaurant since 1936, and it is named after Glenn Fieber's stepfather Kenneth Salmon, known as Solly.
When it opened, the restaurant was called Solly's Coffee Shop, but Glenn renamed it Solly's Grille in 1993 when he bought the restaurant from his mother.
[3] Their traditional butter burger is cooked atop a flattop grill and is steamed in butter and is then topped with butter as a condiment.
In 2022, they were named a James Beard America's Classic.