Step 1: Make the Chocolate Crust
Crush Oreo cookies into fine crumbs using a food processor.
Mix with melted butter and press into a 9-inch pie pan.
Chill in the refrigerator while preparing the filling.
Step 2: Make the Peanut Butter Filling
In a bowl, beat cream cheese, peanut butter, powdered sugar, and vanilla until smooth.
Fold in whipped cream until light and fluffy.
Spread evenly into the chilled crust.
Step 3: Make the Chocolate Ganache
Heat heavy cream in a small saucepan until just simmering.
Pour over chocolate chips and let sit for 1 minute, then stir until smooth.
Stir in butter for a glossy finish.
Pour over the peanut butter filling and smooth out.
Step 4: Chill And Garnish
Refrigerate for at least 2 hours, or until set.
Garnish with chopped peanut butter cups, crushed peanuts, or a peanut butter drizzle.