For the crust, pulse the Oreo cookies in a food processor until finely crushed. Add the melted butter and stir until combined. Press the mixture into the bottom and up the sides of a 9-inch pie plate. Place the crust in the freezer while you prepare the filling.

In a large bowl, beat together the peanut butter, granulated sugar, and softened cream cheese until smooth and creamy. Fold in the thawed whipped topping until well combined and no streaks remain. Pour the filling into the prepared crust and spread evenly.

Cover the pie with plastic wrap and freeze for at least 4 hours, or until firm. Slice and serve.