In a mixing bowl, combine the crushed Oreos and melted butter. Stir until the mixture resembles wet sand.

Press the blend firmly into the bottom of a greased 9x9-inch baking dish to form the crust.

In a large bowl, beat together the peanut butter, softened cream cheese, and powdered sugar until smooth and creamy.

Add the vanilla extract and continue mixing until fully incorporated.

Gently fold in the whipped cream until the filling is light and fluffy.

Pour the filling over the prepared Oreo crust, spreading it evenly with a spatula.

Chill in the refrigerator for at least four hours, or until set firmly.

Once set, remove the dessert from the fridge, drizzle chocolate sauce over top, and sprinkle with crushed Oreos or mini chocolate chips.