01 - Preheat oven to 350°F. Mix chocolate wafer crumbs, melted butter, and sugar until texture resembles wet sand. Press firmly into bottom and sides of 9-inch pie dish. Bake 8-10 minutes until set. Cool completely.
02 - Melt chocolate in heatproof bowl over simmering water (double boiler) or microwave in short bursts, stirring until smooth. Set aside to cool slightly.
03 - In large bowl, beat butter and sugar with electric mixer on medium-high speed for 3-4 minutes until light and fluffy.
04 - Beat in vanilla extract and cooled melted chocolate until smooth and fully incorporated.
05 - Add eggs one at a time, beating on medium-high speed for 3-5 minutes after each addition. Total mixing time should be approximately 10 minutes until filling is silky and doubled in volume.
06 - Pour filling into cooled crust. Smooth top with spatula. Refrigerate at least 4 hours or until completely set.
07 - In chilled bowl, whip cold cream, powdered sugar, and vanilla until soft peaks form.
08 - Spread or pipe whipped cream over chilled pie. Garnish with chocolate shavings if desired. Slice with hot knife for clean edges.