The Sponge Patty resembles a Krabby Patty except it is inedible and has two light pink kitchen sponges used instead of bread buns. Other ingredients include an aluminum brush for the patty, lime-green soap as the special sauce, and mop strings as the lettuce. It is served on the same plate as a normal patty.
Role in episode
SpongeBob accidentally creates the Sponge Patty after Plankton, who is inside of his head at the time, removes his eyes. Plankton's plan is to see how SpongeBob makes a Krabby Patty right with his own eyes, but does not realize that SpongeBob cannot make a Krabby Patty blind.
After SpongeBob constructs the Sponge Patty and hands it to a customer, Plankton plugs SpongeBob's eyes back in and he is horrified to see the Sponge Patty that he made.