1 c. sugar
3 pkg. (8 oz. each) cream cheese, softened
5 eggs
1 tbsp. vanilla
12 oz. chocolate chips

Add sugar to softened cream cheese and beat. Add eggs and vanilla; beat well. Measure out 3 cups of mixture and add melted chocolate chips to this. Pour plain cheesecake mixture into a 9 inch pie pan. Add dollops of the chocolate mixture and using a knife swirl through it. Bake at 350 degrees for 40 minutes.