From the Super Mario Wiki
A Bone-In Cut is an item found in Super Paper Mario. They are only found by getting them from Muth enemies. When used, it doubles attack power for 10 seconds. This item can be used as the sole ingredient for its more powerful version, the Spit Roast, which can be made by Saffron in Flipside. It can also be brought to Dyliss in Flopside and mixed with a Power Steak to make a Gorgeous Steak.
Names in other languages
||Pincho de carne
||From viande (meat) and os (bone)
||Leg of meat