- 1
**Make the crust:** Pulse the Oreos (filling and all) in a food processor until fine crumbs form. Stir in the melted butter until the mixture looks like wet sand. Press firmly and evenly into the bottom and up the sides of a 9-inch pie dish. Refrigerate for at least 20 minutes while you make the filling.
- 2
**Whip the cream:** Using a hand mixer or stand mixer with a whisk attachment, whip the cold heavy cream to stiff peaks. Set aside in the refrigerator.
- 3
**Make the filling:** In a large bowl, beat the softened cream cheese with a hand mixer until smooth, about 1 minute. Add the peanut butter, powdered sugar, and vanilla extract and beat until completely combined and fluffy, about 2 minutes. Taste — it should be sweet, salty, and rich.
- 4
**Fold together:** Gently fold the whipped cream into the peanut butter mixture in two additions, using a rubber spatula. Keep the folds light and slow to preserve the mousse texture.
- 5
**Fill and chill:** Spread the filling evenly into the chilled crust. Smooth the top with an offset spatula or the back of a spoon. Cover loosely with plastic wrap and refrigerate for at least 4 hours, or overnight for best results.
- 6
**Make the ganache:** Place the chocolate chips in a small bowl. Heat the heavy cream in a small saucepan (or microwave) until just simmering. Pour the hot cream over the chips, let sit 1 minute, then stir until completely smooth. Cool to a drizzleable consistency, about 5 minutes.
- 7
**Serve:** Slice the pie with a sharp knife warmed under hot water (wipe between each cut for clean slices). Plate each wedge, drizzle with ganache, add a dollop of whipped cream, and sprinkle crushed Oreos or peanuts on top. Serve cold.