A number of foods are specific to, or known to have originated in St. Louis.
St. Louis-style pizza
St. Louis Gooey butter cake
Gooey butter cake (also more recently known as "ooey gooey butter cake") is a type of cake traditionally made in, and invented in, St.Louis. It is served locally as a breakfast pastry, though also served as a dessert.
Toasted ravioli may have originated in Sicily, where fried ravioli containing a sweet filling is a traditional Christmas time dish "commonly referred to as meat pillows." However, most accounts of the first toasted ravioli can be traced to the Italian neighborhood, known as "The Hill", of St. Louis, Missouri, in the United States.