24 OREO Chocolate Sandwich Cookies, crushed (about 2 cups)
1/4 cup (1/2 stick) butter or margarine, melted
4 pkg. (8 oz. each) PHILADELPHIA Cream Cheese, softened
1 cup sugar
2 Tbsp. flour
1 tsp. vanilla
1 pkg. (8 squares) BAKER’S Semi-Sweet Baking Chocolate, melted, slightly cooled
4 eggs
PREHEAT oven to 325°F. Mix crumbs and butter; press firmly onto bottom of 13×9-inch baking pan. Bake 10 minutes.
BEAT cream cheese, sugar, flour and vanilla in large bowl with electric mixer on medium speed until well blended. Add melted chocolate; mix well. Add eggs, 1 at a time, mixing on low speed after each addition just until blended. Pour over crust.
BAKE 45 to 50 minutes or until center is almost set. Refrigerate at least 4 hours or overnight. Cut into 32 squares to serve. Store leftover dessert squares in refrigerator.

My mom made this awhile back for a family get together and it was so yummy!  I remember it was EXTREMELY rich though!