In a medium bowl, combine crushed cookies and melted butter. Press firmly into the bottom and up the sides of a 9-inch pie plate.
In a large bowl, beat cream cheese, peanut butter, and powdered sugar until smooth.
Gently fold in the thawed whipped topping until well combined.
Spoon the filling into the prepared crust and spread evenly.
Chill for at least 2 hours, or until firm.
Before serving, drizzle with chocolate syrup and sprinkle with chopped peanuts, if desired.
Notes
This pie is best served cold. For an extra decadent touch, you can add a layer of melted chocolate to the bottom of the crust before adding the filling.