The fried onion burger was invented in Oklahoma in 1920 during The Great Depression. Onions were cheap and beef was expensive so people started adding onions to their burgers to cut down on costs. Fast forward a century later and the fried onion burger is still a highly sought-after bite that has expanded way beyond Oklahoma! The Fried Onion burger that's featured in food festivals around the world is now coming to Wilmington, North Carolina!