Stuffed Cupcakes

1 pkg. chocolate or butterscotch cake mix
Mix cake mix according to recipe on box. Fill cupcakes 1/2 full.

Center Mixture
1 (8 oz.) pkg. Philadelphia cream cheese, softened
1 egg, beaten
1 c. sugar
1 (6 oz.) chocolate chips
Mix egg with cream cheese and sugar. Add chocolate chips. Mix well. Put 2 teaspoons of filling in center of each cupcake. Bake 20 minutes