CRUST:

8 oz. Nabisco chocolate wafers
4-6 tbsp. melted butter

Combine and press in bottom of springform pan.

FILLING:

1 1/2 lbs. softened cream cheese
1 c. sugar
5 eggs
1 1/2 tsp. vanilla
2 oz. melted semi sweet chocolate

Combine cream cheese, sugar, eggs and vanilla and beat until smooth. Pour half the batter into a springform pan. Fold chocolate into remaining batter and swirl into pan. Cut through chocolate with a knife. Bake at 300 degrees for 50 minutes or until set. Refrigerate 2 hours.

FROSTING: Mix 6 ounces melted semi sweet chocolate and 1/2 cup sour cream, beat until spreadable. Spread on chilled cheese cake.