Combine cake mix, water, egg and flour. Blend on low speed. Beat two minutes at medium speed. Place a small amount of butter or margarine in each cup of Aebleskiver Pan. Heat pan slightly; fill cups 2/3 full with batter. Cook until bubbly; turn carefully with fork and finish baking on the other side. Remove from pan and place on paper towels. Sprinkle confectioners sugar on top. If desired, serve with sweetened lingonberries.