From the Super Mario Wiki
A Gingerbread House is a recipe found in Super Paper Mario, and is made by Dyllis. As its name implies, it looks exactly like a sturdy gingerbread house. It's made from a Chocolate Cake and a Mousse. Using it restores thirty HP and cures Poison, twice as much HP as either ingredient on its own, and equal to the healing sum of both (15+15=30).
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