Preheat oven to 325 degrees F

Combine butter and Oreo crumbs in a mixing bowl

Spread evenly on the bottom of a 10" springform pan

Set aside

On medium speed, using paddle attachment, beat the cream cheese for about a minute

Slowly add icing sugar

Once incorporated, add the eggs

Mix until incorporated then add peanut butter

Mix until smooth

Pour filling on top of the Oreo base (this is a thicker batter, so you may have to scoop it out and spread it to cover the base evenly)

Bake for 45 minutes

Let cool once baked

Melt chocolate chip and peanut butter, mixing together, in a double boiler

You can either spread the chocolate on top of the entire cooled cheesecake or drizzle it on

Sprinkle the chopped chocolate bar over the top of the cheesecake (bonus points for you if you didn't eat any of the chocolate bar while you were waiting..)

Let chocolate set

Keep in the fridge, but serve at room temperature