Thinly sliced onions smashed directly into beef on a hot griddle, caramelizing into a savory crust that no other burger in the country can replicate. Oklahoma invented this, and the state has been perfecting it ever since.
The onion-fried burger was born out of Depression-era creativity, and what started as a practical solution became one of the most beloved regional food traditions in America. Small-town diners along old Route 66 do it.
Neighborhood spots in the city do it. And every single version has its own loyal crowd that would drive considerable distances to get there. This is not just a burger…