Mix crushed Oreo cookies with melted butter until crumbs are evenly moistened, then press firmly into the bottom and up the sides of a 9-inch pie pan.
Refrigerate crust while preparing filling.
In a large mixing bowl, beat cream cheese until smooth and fluffy, about 2 minutes.
Add peanut butter, powdered sugar, vanilla extract, and heavy cream, beating until well combined and creamy.
Gently fold in 6 oz of the Cool Whip until mixture is light and fluffy.
Fold in mini chocolate chips.
Spread filling evenly into the prepared Oreo crust and smooth the top.
Spread remaining 2 oz Cool Whip over the top of the pie and sprinkle with chopped peanuts.
Refrigerate for at least 4 hours or overnight until firm before slicing and serving.