A Krabby Patty is a burger sold at the Krusty Krab. It's a basic plot element that contributed to the Krusty Krab's existence. Its the most frequently-seen setting in SpongeBob SquarePants. It is the most famous burger in the Pacific ocean. The Krabby Patty is made out of a frozen hamburger with fresh lettuce, crisp onions and tomatoes with undersea cheese, pickles, mustard, ketchup, and with a special secret formula (a pinch of King Neptune's Poisedon Powder).