Preheat oven to 350 degrees.
Place Oreo's in a blender or food process, pulse until fine crumbs. Mix with melted butter.
Press into 9 inch spring form pan. Bake for 8 minutes. Remove from oven.
In a mixer cream together cream cheese, powdered sugar and cocoa powder until well blended. Mix in 1 egg and a time. Blend in peppermint extract and melted chocolate. Mixture will be thick.
Pour into baked Oreo Crust. Bake for 60-70 minutes until it starts to pull away from the sides and is cooked through.
Let cool completely. Run a knife around the edges to remove the sides of the pan.
Melt heavy cream and chocolate chips together, stirring until smooth. Pour over cheesecake. Sprinkle with peppermint baking bits.
Set in fridge for 4-6 hours until chocolate is set and the cheesecake is cool.