Marble Cheesecake - cooking recipe

Ingredients

1 c. chocolate chips
1/2 c. sugar
1 1/2 c. graham cracker crumbs
3 Tbsp. sugar
1/4 c. melted butter or margarine
16 oz. cream cheese
3/4 c. sugar
1 c. sour cream
1 tsp. vanilla
4 eggs

Preparation

Melt chocolate chips and 1/2 cup sugar.
Mix graham cracker crumbs, 3 tablespoons sugar and melted butter.
Pat mixture on bottom of spring-form pan.
Beat cream cheese; gradually beat in 3/4 cup sugar.
Mix in sour cream and vanilla.
Add eggs, one at a time, beating well.
Divide batter in half.
Stir melted chocolate into first half.
Pour chocolate batter onto crust.
Cover with plain batter and marbleize.
Bake at 325\u00b0 for 50 minutes.
Shut off oven and open door.
Leave cheesecake in oven for 30 additional minutes.
Cool at room temperature and refrigerate.