At the Krusty Krab, SpongeBob is seen cooking Krabby Patties. He makes several Krabby Patties and falls in love with one, naming it "Patty." The patties are taken to customers who start wolfing down on the food. Consumed by guilt, SpongeBob rescues Patty by replacing her with a shoe, which the customer still enjoys.
SpongeBob takes Patty to his house. Patrick and Sandy arrive, both hoping to play with SpongeBob, only for SpongeBob to ignore them in favor of spending the day with Patty. Patrick is especially dismayed to have been rejected. Meanwhile, SpongeBob takes Patty to several activities, such as going to the fair eating cotton candy, the mall, the beach, and when clams try to eat Patty, SpongeBob attacks them with karate. Later, they ride a boat down a river, and they go down a waterfall and Patty falls apart in the water. SpongeBob puts the sandwich back together, but now Patty is soggy and gloomy looking.
After six hours of activity, SpongeBob takes Patty on a picnic in the park, but by now, the patty has spoiled. Somewhat oblivious to this, SpongeBob decides to take it on a date to the Krusty Krab. Once there, SpongeBob informs Mr. Krabs about his date and Mr. Krabs gets excited, thinking he is dating a rich girl, but finds it strange when he discovers the date is a Krabby Patty, with a rancid smell that drives off other customers. Squidward tries to tell SpongeBob that his date is just a rotten Krabby Patty, but SpongeBob still thinks Patty is beautiful until he smells her, then sees the hideous appearance of the spoiled patty.
SpongeBob questions how this came to be. Mr. Krabs tells the fry cook that he once fell in love with a Krabby Patty. He then tells SpongeBob that Krabby Patties are meant to be loved and eaten. SpongeBob finally knows what he must do and eats his date, feeling nauseous afterward. The episode ends with SpongeBob asking for a doggie bag.
There were 12 different models made for what SpongeBob would look like after Patrick ties him up.
This episode aired in Germany on June 7, 2007, before it aired in the USA.
There are 32 hearts on the title card.
The Tough Fish who wanted to eat Patty, but instead got a shoe burger is the same tough fish that was the first fish in the telescope in "Shanghaied." He's also one of the fish who helps SpongeBob stall the kids in "Krabby Land." This episode also reveals that he loves grilled shoes.
The Patty gone rottenness is similar to the one they once tried to feed the health inspector in "Nasty Patty." Considering Patty was given cotton candy, and dropped in dirty water, it did go through an arguably similar ordeal to the Nasty Patty.
In "Born Again Krabs" and "Nasty Patty", spoiled Krabby Patties were potentially lethal if consumed.
SpongeBob did not notice the patty was rotten until Mr. Krabs and Squidward revealed it to him.