Chocolate & Vanilla Cheesecake

Directions

1. 1
   PREPARE GRAHAM CRACKER CRUST--------.
2. 2
   Mix cracker crumbs, sugar& melted butter.
3. 3
   Press mixture onto bottom and 1/2 inch up side of 9 inch springform pan.
4. 4
   Bake at 350° for 8 to 10 minutes.
5. 5
   Cool.
6. 6
   CHEESECAKE-------.
7. 7
   Combine cream cheese, 3/4 cup sugar, sour cream& 2 teaspoons vanilla in a large bowl; beat on med.
8. 8
   speed until smooth.
9. 9
   Add flour, 1 tablespoon at a time, blending well.
10. 10
    Add eggs; beat well.
11. 11
    COCOA MIXTURE------.
12. 12
    Combine cocoa and 1/4 cup sugar in small bowl.
13. 13
    Add oil and 1/2 teaspoon vanilla.
14. 14
    Add 1 1/2 cups of the cream cheese mixture; mix until well blended.
15. 15
    Spoon plain and chocolate mixtures alternately into prepared crust, ending with dollops of chocolate on top; gently swirl with knife for marbled effect.
16. 16
    Bake at 450° for 10 minutes; do not open the oven door; decrease temp.
17. 17
    to 250° and continue to bake for 30 minutes.
18. 18
    Turn off oven.
19. 19
    Leave the cheesecake in the oven for 30 minutes without opening the door.
20. 20
    Remove from oven.
21. 21
    Loosen cake from side of pan.
22. 22
    Cool completely.
23. 23
    Chill thoroughly.