In a mixing bowl ,cream butter and sugar ;add eggs . Combine flour and baking soda ;add to the cream mixture alternately with 1/3 cup of lemonade concentratrate. Mix well.
Drop by rounded teaspoonfuls on an ungreased baking sheet . Bake at 400 degrees for 8 minutes . Remove to wire racks ,Brush with remaining lemonade concentrate ;sprinkle with sugar ,Cool . yield 6 dozen