Chocolate Chip Cheesecake

1 Graham Cracker Crust
8 oz. Cream Cheese, softened
1/2 C. White Sugar
8 oz. Sour Cream
2 Eggs
1 T. Vanilla
3/4 Chocolate Chips

Bake at 350 for 45 minutes. Turn oven off, but leave cheesecake in oven for 1 hour.
Refrigerate before serving.