Full of Beans is a brand of baked beans that first appears in the episode "Heat Signature" when Lumpy Space Princess is living in her hobo camp. In that episode, LSP is cooking a can of the beans and telling Melissa over the phone how awesome it is that she found it, when Finn and Jake, thinking they are invisible ghosts, try to pull a prank on LSP by messing with her stuff. In the process, Finn accidentally kicks over and spills the can of beans, enraging LSP, who attacks Finn and Jake and threatens to kill them.
The beans later reappear when Jake eats from a can of them at the end of "Everything's Jake." In "Chips and Ice Cream," Morty Rogers is seen opening a can of them and cooking a potful while trying to take his mind off of Chips and Ice Cream. In "Bad Jubies," LSP stocks the shelter that she, Finn, and BMO built with some cans of the beans, along with other food. Soon after the storm starts, LSP eats them all.