1/3 c. powdered sugar
1 1/2 c. graham cracker crumbs
4 tbsp. butter or margarine

Melt butter and add to graham cracker crumbs and powdered sugar. Line the bottom of a spring form pan, packing firmly. 1 c. granulated sugar
3 (8 oz.) pkgs. cream cheese
1 generous tsp. vanilla flavoring
4 eggs

Pour above ingredients into spring form pan (the crust is as yet unbaked) and bake in preheated oven at 350 degrees for approximately 50 minutes. Do not turn off the oven. Remove the cheesecake and top with 1 pint commercial sour cream and return to the oven for another 5 minutes. Cool in spring form pan for a few minutes. Run a knife around the edge to loosen. Remove side of spring form pan and refrigerate.