Preheat your oven to 350°F (175°C). In a mixing bowl, combine crushed chocolate cookies with melted butter. Press evenly into a 9-inch pie dish and bake for 8-10 minutes until set. Let cool.

In a clean mixing bowl, beat together creamy peanut butter, powdered sugar, and vanilla extract until smooth and creamy, about 3-4 minutes.

Pour the peanut butter filling into the cooled crust, spreading it evenly and smoothing the top.

In a heatproof bowl, combine chocolate chips and heavy cream. Heat in the microwave until melted and smooth. Pour over the peanut butter filling.

Cover with plastic wrap and chill in the refrigerator for at least 2 hours.

Remove from the fridge, garnish with chocolate shavings, slice, and serve chilled.