what type of food did mcdonald’s originally specialize in when it first opened in 1940

McDonald's originally specialized in barbecue when it first opened in 1940. The first restaurant, opened by the McDonald brothers in San Bernardino, California, was a barbecue restaurant featuring a large menu with car hop service and its most famous offering was hot dogs. It was not primarily a burger restaurant at that time. Later, in 1948, the brothers revamped the concept to focus on hamburgers and reduced the menu to a few items, pioneering what became the fast-food model.