The signature food of the Krusty Krab in SpongeBob SquarePants is the Krabby Patty.
The Krabby Patty is a fictional hamburger served at the Krusty Krab restaurant in the animated television series SpongeBob SquarePants. It is associated with SpongeBob’s work as a fry cook and with the restaurant’s owner, Mr. Krabs.
The series repeatedly treats the recipe as a closely guarded secret. The running mystery surrounding its ingredients is a major recurring joke, while the burger itself functions as the Krusty Krab’s most important menu item.
The Krabby Patty is fictional, so it should not be confused with real regional hamburgers or commercial fast-food products. Licensed merchandise and themed restaurants have sold real-world foods inspired by it, but those products do not establish a single canonical edible recipe from the show.