The Krabby Patty is a burger that is sold at the Krusty Krab restaurant on SpongeBob SquarePants. It is the most popular item at the restaurant and is what SpongeBob cooks most of the time. The Krabby Patty recipe is kept completely secret. Plankton repeatedly tries to steal the secret formula, but never succeeds, except in The SpongeBob SquarePants Movie. The ingredients used to make the Krabby Patty are mentioned in "Plankton!" - bun, patty, cheese, ketchup, mayonnaise, mustard, pickles, lettuce, onions, tomatoes and top bun.