2 (8 oz.) pkgs. cream cheese
3 eggs
1 (1 oz.) sq. unsweetened chocolate
3 tbsp. flour
1 tsp. vanilla
3/4 c. sugar
1 lg. ready-made graham crust

Mix all ingredients except chocolate. Melt chocolate. Soften cream cheese, beat in eggs; add flour, sugar, vanilla. Reserve 1/3 mix in bowl and add chocolate.

Swirl chocolate through remaining batter already poured in crust. Bake at 450 degrees for 10 minutes. Reduce heat to 250 degrees and bake 30 minutes longer.