Fruitcake is a cake made with candied or dried fruit, nuts, and spices, and optionally soaked in spirits. The color of it is brown, and in "Christmas Who?," it has a pink label that reads the food's name in green text.
Role in series
"It's a SpongeBob Christmas!"
Plankton makes fruitcake laced with Jerktonium as part of a plan to turn the Bikini Bottomites into jerks. He uses the Jerkmaker-9000 to dispense the cake to SpongeBob, only for the latter to prove immune to the Jerktonium's effects. Thinking his plan to be a failure, Plankton leaves the Jerkmaker-9000 with SpongeBob as he goes to activate Plan B.
- Fruitcake on Wikipedia