Chocolate Cheesecake

Press Chocolate Wafer Crust mixture on bottom and 1/2 inch up the sides of a 10 inch springform pan. Pre-bake as directed. Place chocolate morsels in top of double boiler; bring water to a boil. Reduce heat to low; cook until chocolate melts. Beat cream cheese at high speed with electric mixer until light and fluffy; gradually add sugar, mixing well after each addition. Stir in melted chocolate, cocoa, and vanilla; beat until blended. Stir in sour cream, blending well. Pour into prepared pan. Bake at 300? for 1 hour and 40 minutes. Let cool to room temperature on wire rack; chill at least 8 hours. Garnish with whipped cream. Yield 10-12 servings.