From the Super Mario Wiki
The Mushroom Crepe is an item made by mixing Cake Mix with an Ultra Shroom in Paper Mario: The Thousand-Year Door. It can be sold anywhere for 100 coins and heals thirty HP and twenty FP.
The Mushroom Crepe makes a reappearance in Super Paper Mario, where it is now made by mixing a Shroom Shake with a Cake Mix. In this game, it restores twenty HP and cures poison.
Names in Other Languages
(SPM):Crêpe de Champis
||Mix between "champignon", French for "mushroom", and "crêpe", the name of the food.