CRUST:

4 c. Oreo crumbs
4 tbsp. melted butter

Mix together and pat into springform pan. Press up sides.

FILLING:

4 (8 oz.) pkgs. cream cheese
1 1/4 c. sugar
2 tbsp. flour
4 whole eggs
3 egg yolks
1 1/2 tsp. vanilla

Mix cream cheese and sugar together. Beat well. Add remaining ingredients. Beat again well.

Pour one-half filling into crust. Sprinkle with 1 to 2 cups broken Oreo's. Pour remaining half of filling mixture onto Oreo's.

Bake 425 degrees 15 minutes. Lower oven temperature and bake remaining 50 minutes.

Refrigerate and top with topping.

TOPPING:

2 c. sour cream
1/4 c. sugar

Slice in very thin slices as this is a very rich dessert.