2 cups chocolate wafer crumbs
5 tablespoons melted butter
3 packages (8 ounces each) cream cheese, at room temperature
1 cup granulated sugar
5 large eggs
2 ounces (2 squares) semisweet chocolate, melted
6 ounces (6 squares) semisweet chocolate, melted
1/2 cup sour cream
For crust, mix together chocolate crumbs and melted butter, in a medium bowl, until well blended. Press into a 9-inch springform pan.
Preheat oven to 300 degress F.
To prepare filling, in a large bowl, beat together cream cheese, sugar and eggs at medium speed until smooth and fluffy. Spoon half of cream cheese mixture into crust.
Stir chocolate into remaining cream cheese mixture until well blended. Drizzle over batter in the crust to make swirls.
Bake cheesecake for 50 minutes. Transfer pan to a wire rack. Cool completely.
Transfer cheesecake to a serving plate, cover with plastic wrap and chill for 2 hours.
Uncover cheesecake; carefully remove the side of pan.
To prepare frosting, in a small bowl, mix together chocolate and sour cream. Spread over cheesecake. Chill briefly until frosting is set.