Prepare Cookie Crust: Combine crushed chocolate cookies with melted butter in a bowl, then press into a pie dish to form a solid crust. Bake at 350°F for about 10 minutes to set.

Make Peanut Butter Filling: In a mixing bowl, combine creamy peanut butter, powdered sugar, and vanilla extract, stirring until smooth and creamy.

Assemble the Pie: Once the crust has cooled, evenly spread the peanut butter filling over the crust.

Prepare Ganache: Melt chocolate chips with heavy cream over low heat, stirring until smooth, then gently pour over the peanut butter filling.

Chill the Pie: Refrigerate the assembled pie for at least 4 hours to allow it to set.

Garnish and Serve: Adorn the pie with chocolate shavings just before serving.