In a large mixing bowl, whip together softened cream cheese and creamy peanut butter for 5 minutes until it is fluffy and creamy.
Add confectioners' sugar and vanilla; mix for 1 minute longer until it is mixed together.
In another bowl, whip the heavy cream until stiff peaks form.
Once it is whipped, fold or mix into the peanut butter filling, making sure not to overmix and deflate the whipped cream.
Fold in chopped peanut butter cups.
Pour into chilled pie crust or place in the freezer to chill for at least 25 to 30 minutes.
It is important to let it harden before pouring the warm chocolate ganache on top.