4 (8 oz.) pkg. cream cheese
1 pt. sour cream
5 eggs
1 1/4 c. sugar
2 tsp. vanilla
1 c. chocolate chips (optional)
10 1/4 inch springform pan

Beat cream cheese, sour cream and sugar. Then add eggs, one at a time. Mix well. Add vanilla. Stir in chips, if desired. Bake 20 minutes at 450 degrees. Reduce heat to 250 degrees. Bake for 55 minutes longer.