Beanburger is an iconic San Antonio dish originally made with a beef patty that is topped with diced onions, crushed Fritos corn chips, refried beans, and Cheez Whiz (processed cheese sauce or spread). Although there are several theories about its origin and inventor, a man named Frank Sills is nowadays synonymous with the burger as he was the owner of the original Sills Snack Shack, where this burger was originally served.

Today, there are numerous restaurants in San Antonio that serve different versions of the bean burger – with added crushed tostada chips, melted cheddar, or pico de gallo.