8 1/2 oz Chocolate Wafers, Fine Crush
1/2 c  Butter, Melted
12 oz Semi-sweet Chocolate Chips
1 1/2 c  Heavy cream
16 oz Cream Cheese, Softened
1/4 c  Sugar
4    Large Eggs
1 ts Vanilla Extract
1/2 c  Heavy Cream Whipped (Opt.)

In large bowl, combine chocolate wafer crumbs and butter. Pat fimly into
9-inch springform pan, covering bottom and 2 1/2 inches up sides. Chill.
Preheat oven to 325 degrees F. Combine over hot (not boiling) water,
chocolate chips and heavy cream. Stir until morsels are melted and mixture
is smooth. Set aside. In large bowl, combine cream cheese and sugar,
beating untl creamy. Add eggs, one at a time, beating well after each
addition. Add chocolate mixture and vanilla, mix until blended. Pour into
prepared crust. Bake at 325 degrees F. for 60 minutes. Turn oven off. Let
stand in oven with door ajar 1 hour. Remove, cool completely. Chill 24
hours. Decorate edge with whipped cream, if desired.