1 c. graham cracker crumbs
3 tbsp. sugar
3 tbsp. butter, melted
3 (8 oz.) pkgs. cream cheese, softened
3/4 c. sugar
3 eggs
1 c. sm. semi-sweet chocolate pieces
1 tsp. vanilla

Combine crumbs, sugar and butter; press onto bottom of 9 inch springform pan.

Combine cream cheese and sugar, mixing at medium speed on electric mixer until well blended. Add eggs, one at a time, mixing well after each addition. Blend in chocolate pieces and vanilla; pour over crust. Bake at 450 degrees 10 minutes. Reduce oven temperature to 250 degrees, continue baking 35 minutes. Loosen case from rim of pan. Cool before removing rim of pan; chill.