The Krabby Patty is the Krusty Krab's signature and popular food item. It is a hamburger of sorts made from seaweed-sea buns, undersea vegetables, condiments, and a patty; it can also be ordered with cheese. The ingredients of the patty itself are purposely kept secret throughout the entire series. It was created by Mr. Krabs and Plankton. It is the best-known item at the restaurant and the most famous food cooked in Bikini Bottom. It first appears in "Help Wanted" and is what SpongeBob cooks most of the time at his job. The Krabby Patty is a basic plot element that contributes to the Krusty Krab's existence. A running gag throughout the series is Plankton coming up with plans to steal the Krabby Patty secret formula or a Krabby Patty to analyze the formula with an invention, but always ending up with failures.