Chocolate Marble Cheesecake

Prepared crust (recipe below) 3 (8-oz) packages of cream cheese, softened 1 cup sugar, divided 1/2 cup sour cream

2-1/2 teaspoons vanilla extract, divided 3 tablespoons flour 1/4 cup cocoa powder 1 tablespoon vegetable oil

Directions:
Prepare crust and set aside. Place softened cream cheese, 3/4 cup sugar, sour cream, and 2 teaspoons vanilla in a large mixer bowl and beat until smooth. Add flour a little at a time, beating after each addition, until smooth. Set this mixture aside.

Preheat the oven to 450°. In another bowl, stir together cocoa powder and 1/4 cup sugar. Add 1/2 teaspoon vanilla extract, vegetable oil, and 1-1/2 cups of the cream cheese mixture, beating until well blended. Spoon the two batters alternately into the crust, ending with chocolate on top. Swirl a knife through the batter to create a marbled look.

Place the cheesecake in the oven, and do not open the oven door again until the baking process is finished. Bake at 450° for 10 minutes. Reduce the heat to 250° and bake for ­30 minutes. Turn off the oven and leave the cheesecake in the oven for another 30 minutes. Then, open the oven door and remove the cheesecake. Place on a rack to cool; store in refrigerator, covered.

Crust:
1 cup vanilla wafer crumbs
1/4 cup powdered sugar
1/4 cup cocoa powder
1/4 cup butter

Heat oven to 350°. Mix crumbs, powdered sugar, cocoa powder, and butter. Press the mixture into the bottom of a 9-inch springform pan, bringing it up the sides of the pan about 1/2 inch. Bake for 8 minutes. Cool on a rack.