Break the cookies into smaller pieces and place in a blender or food processor. Pulse until you have fine crumbs.
Mix the cookie crumbs and the melted butter in a small bowl until fully combined. Press the mixture on the bottom of a pie or tart pan.
In a large bowl, cream together the cream cheese and peanut butter. Mix in the sugar, vanilla and cream until fully combined.
Pour the peanut butter mixture into the prepared pie pan, and freeze until hardened, around 5 hours or overnight. Thaw, and sprinkle the chopped peanut butter cups on top.