Tucked along a stretch of historic Route 66 in El Reno, Oklahoma, sits a hamburger joint that has been turning out legendary onion burgers since 1926. Robert’s Grill is more than just a place to grab lunch.
It represents nearly a century of American roadside culture, family tradition, and the kind of cooking that keeps people coming back generation after generation. The aroma of fried onions drifts down the street, pulling travelers off the highway and locals through the door day after day.
El Reno, a small town west of Oklahoma City, has become synonymous with the onion burger, and this modest diner claims the title of the oldest still-operating onion burger restaurant in the region…