Breakfast Kingdom is a kingdom within the Land of Ooo, it first appeared in the episode "Hitman." Breakfast Princess and Toast Princess, who are sisters, rule this kingdom together. Breakfast Kingdom is located partly in the Desert of Doom. The Ice King seems to try and 'brainwash' the Princesses with Love Potion, as revealed in "Hitman." It is later seen again in "We Fixed A Truck" where its oil is used to repair the truck Finn found.
The Breakfast Kingdom seems to be made of common things eaten for breakfast, with some other things used for breakfast. It seems to be located partially in the Desert of Doom.
- The Candy Kingdom and this one are the only ones that have edible subjects.
- This is the only kingdom so far that has two princesses ruling at the same time.