After all, the fast-food burger began with the Wichita, Kansas-based company, which is often credited as the first chapter of a multibillion-dollar industry - and what now feeds huge swaths of America. Sold for just 5 cents, the tiny burger was so easy to eat that its inventors dubbed it the 'slider.' And if you've ever had the pleasure of eating a sack of White Castle burgers hot from the steamer, you know what we're talking about.Īlthough White Castle may not be at the top of the fast-food food chain today, fellow hamburger makers owe it supreme gratitude. It all began so innocently: a two-bite, 100 percent all-beef patty topped with chopped onions and a pickle.