Preheat oven to 350˚F.
For crust: In a large bowl mix together the chocolate wafer crumbs and melted butter until fully incorporated. Press the mixture into a 9” pie dish or tart shell, pressing both evenly on the bottom and up the sides. Place onto a baking sheet and then into the refrigerator until ready to use.
For filing: Place pumpkin puree in a bowl and add the remaining filling ingredients. Stir together until fully incorporated and no lumps remain. Pour the filling into the prepared crust and carefully set into the lowest rack of the oven. Bake for 55 to 70 minutes or until the filling has set, but is slightly loose in the middle.
Allow pie to cool completely, about 2 hours.
For sweetened cream: Pour cream, sugar and vanilla extract into a mixing bowl and beat together using an electric hand mixer until stiff peaks form.
To serve: Generously top pie with whipped cream and finish with chocolate shavings.