01 - Crush chocolate sandwich cookies into fine crumbs using a food processor or place them in a resealable bag and crush with a rolling pin. Combine crumbs with melted butter until well mixed. Press the mixture firmly into the bottom and up the sides of a 9-inch pie dish. Chill in the refrigerator while preparing the filling.
02 - In a large bowl, beat together the peanut butter, cream cheese, and powdered sugar until smooth and creamy. In a separate bowl, whip the cold heavy cream and vanilla extract until stiff peaks form. Gently fold the whipped cream into the peanut butter mixture until just combined and smooth.
03 - Spread the filling evenly into the chilled crust, smoothing the top with a rubber spatula.
04 - Heat 1/4 cup heavy cream until steaming, then pour over chocolate chips in a heatproof bowl. Let sit for 2 minutes, then stir until smooth and glossy. Spread ganache evenly over the peanut butter layer. Sprinkle with chopped salted peanuts if desired.
05 - Refrigerate the pie for at least 4 hours or until completely set. Slice and serve chilled.