Forget the fancy gastropubs with their truffle aioli and brioche buns. The real burger pilgrimage in America leads to Oklahoma, where a Depression era invention has achieved something close to legendary status.
The fried onion burger is exactly what it sounds like. A ball of ground beef smashed onto a flat top with a handful of fresh onions, the whole thing cooking down into a crispy, caramelized, greasy miracle between two slices of plain white bread.
People fly in from New York, California, and everywhere in between just to taste one. And honestly, they are not wrong to do it…