The Whopper sandwich is the signature product sold by Burger King. Product description The Original Whopper sandwich is a hamburger, consisting of a grilled quarter-pound (113.4 g) beef patty, sesame seed bun, mayonnaise, lettuce, tomato, pickles, ketchup, and raw, sliced onion. Optional ingredients such as American cheese, bacon, mustard or jalapeño peppers may be added upon request. Regional and international condiments include BBQ sauce, salsa and guacamole. BK will also add any cond… (More on Whopper)