As storied as McDonald's Big Mac is, it's not actually the first burger to take on that double-decker, two-patty, bread-in-the-middle burger format. That distinction falls upon a much different ...

Take the Famous Burger, for example. The double-decker burger features Odd Burger’s house-made smash patties, along with onions, lettuce, pickles, cheese, and “famous sauce,” all on a sesame ...