In a mixing bowl, blend together the softened cream cheese, peanut butter, powdered sugar, and vanilla extract until smooth.

In another bowl, mix the graham cracker crumbs, sugar, and melted butter until well combined.

Press the crumb mixture into the bottom of a pie dish to form the crust.

Spread the peanut butter mixture over the crust evenly.

Refrigerate the pie for at least 4 hours to set.

In a chilled mixing bowl, whip the heavy cream, cocoa powder, and sugar together until soft peaks form.

Spread the chocolate whipped cream over the chilled peanut butter pie before serving.