Prehead oven to 350 degrees. Spray a 9x13 oblong pan with cooking spray. Cook pudding and milk. Add cake mix and mix well. Pour into prepared pan. Sprinkle half of the chocolate chips on top and swirl with a knife. Sprinkle remaining chocolate chips and pecans on top. Bake about 25 minutes or until done. Once cooled, dust with confectioner's sugar.