The Krabby Patty is the signature menu item of the Krusty Krab and a popular food in Bikini Bottom. It is the SpongeBob SquarePants franchise's equivalent to real world cheeseburgers. SpongeBob cooks several Krabby Patties during his shift as the restaurant's fry cook. The recipe for the Krabby Patty is a tightly guarded secret, and its ingredients are written on the Krabby Patty secret formula.
Throughout the franchise, there is a recurring plot where Plankton tries to steal either a Krabby Patty or its formula so that he can figure out how to create Krabby Patties and sell them at the Chum Bucket. Despite several different attempts, Plankton's schemes always end up failing.
According to Vincent Waller, "The one thing I can tell you that Steve Hillenburg has let slip is there is absolutely no meat in the Krabby Patty. There is no animal product in there." Stephen Hillenburg planned this from the beginning and confirmed part of the Krabby Patty secret formula.
According to Season 1, Episode 6 "Pickles", this is what is on a Krabby Patty:
1. Top Bun
10. Bottom Bun