01 - Preheat oven to 350°F. Crush Oreo cookies with filling in a food processor until fine crumbs form. Mix with melted butter until combined. Press the mixture into the bottom and up the sides of a 9-inch pie dish. Bake for 10 minutes, then cool completely.
02 - Beat peanut butter and cream cheese together in a large mixing bowl until smooth. Add powdered sugar and beat until incorporated. In a separate bowl, whip heavy cream until stiff peaks form, then gently fold into the peanut butter mixture until completely blended.
03 - Spread the peanut butter filling evenly over the cooled Oreo crust. Refrigerate for at least 2 hours or until fully set.
04 - Whip remaining heavy whipping cream with powdered sugar until stiff peaks form. Spread or pipe whipped cream over the chilled pie. Garnish with crushed Oreo cookies.
05 - Slice and serve cold. Store leftovers covered in the refrigerator.