Pulse the Oreos in a food processor until they are fine crumbs. Combine the melted butter and a pinch of salt. Pulse a few more times. Pour the crushed Oreos into a pie plate and press firmly with fingers into the bottom and up the sides. Place in fridge or freezer to set for a bit.

Meanwhile, make the filling. Beat the cream cheese and peanut butter in the bowl of your stand mixer. Scrape down the sides and make sure everything is combined well. Fold in the whipped topping. Add the crushed candy bar pieces and fold a few more times.

Pour into the prepared Oreo crust and allow to set in freezer 2 to 4 hours before serving. Allow to sit for 10 to 20 minutes if frozen before slicing.