Chocolate Chip Cheesecake

1 individual package of chocolate graham crackers, crushed
1/2 c melted butter
2 T white sugar
2 8 oz packages cream cheese, softened
1/2 c brown sugar
2 eggs
1 egg yolk
1 tsp vanilla extract
1 c semisweet chocolate chips

Preheat oven to 350
Mix crackers, butter, and sugar. Press into 9 in. pie plate. Refrigerate while making filling.

Beat Cream Cheese and brown sugar until smooth. Beat in eggs and egg yolk. Stir in vanilla. Fold in chocolate chips. Pour filling into pie crust. Bake for 50 min.