Headquartered in Miami, Burger King ranks among the largest fast-food chains in the world. Originally founded as “Insta-Burger King,” the chain came out with its signature menu item, the Whopper, in 1957. In 2019, the franchise announced that its “Impossible Whopper,” a version of the Whopper made with a vegetable patty from the startup Impossible Foods, would be available nationwide, courting more health and environmentally conscious customers.