-3) Recipe by: CHRISTMAS COOKBOOK Heat oven to 350 degrees. Mix flour, margarine and powdered sugar. Press in ungreased baking pan, 8x8x2 or 9x9x2 inch, building up 1 cm edges. Bake 20 min. Beat remaining ingredients until light and fluffy, about 3 minutes; pour over baked layer. Bake until no indentation remains when touched in center; about 25 min. Cool; sprinkle with powdered sugar if desired. Cut into 3 cm squares. ----