3 c. graham cracker crumbs
1 c. butter, melted
1 (12 oz.) pkg. semi-sweet chocolate morsels
4 (8 oz.) pkgs. cream cheese, softened
2 c. sugar
4 eggs
1 tbsp. cocoa
2 tsp. vanilla extract
1 (10 oz.) carton sour cream
Whipped cream

Combine graham cracker crumbs and melted butter, mixing well; firmly press on bottom and sides of a 10" spring form pan.

Place chocolate morsels in top of a double boiler; bring the water to a boil. Reduce heat and cook until the chocolate melts, cool and set aside.

Beat cream cheese with an electric mixer until light and fluffy; add sugar and mix well. Add eggs, 1 at a time, beating well after each. Stir in melted chocolate, cocoa and vanilla; beat until blended. Stir in sour cream, blending well. Pour into prepared pan.

Bake at 300 degrees for 1 hour 40 minutes (center may be soft but will firm when chilled). Let cool to room temperature on a wire rack; chill at least 5 hours. Garnish each serving with whipped cream.