* In a large bowl, combine the flour, sugar, cocoa, baking powder and salt. In a small bowl, combine the eggs and butter; add to the dry ingredients and mix well. Stir in chips. * Transfer to a greased 13-in. x 9-in. baking pan. Bake at 350? for 25-30 minutes or until a toothpick inserted near the center comes out clean. Immediately sprinkle with candy bar pieces. Cool on a wire rack. Cut into bars.