In a large mixing bowl, combine eggs, butter and vanilla.
Combine dry ingredients; add to egg mixture and mix well. Stir in chocolate chips. Set aside 1 cup for topping.
Spread remaining batter into a greased 13 x 9 inch baking pan.
In a small mixing bowl, beat cream cheese, peanut butter and sugar until smooth. Add egg and milk, beating on low just until combined. Carefully spread over batter.
Drop reserved batter by T. over filling. Cut through the batter with a knife to swirl.
Bake at 350º for 35-40 minutes or until a toothpick inserted near the center, comes out clean. Cool on a wire rack before cutting.
Refrigerate until serving.
Makes 3 dozenRecipe submitted by florentine on 4/12/00