Directions: * may be purchased in a drug store. Cream shortening and add sugar. Add egg and oil of lemon. Mix. Sift flour before measuring. Measure flour and sift with salt. Dissolve ammonium carbonatein a little of the milk. Add flour and liquid alternately mixing after each addition. Chill dough. Roll 1/4" thick. Cut in squares. Place on greased baking sheet. Sprinkle cookies lightly with sugar. Bake 12-15 mins. In a 375 oven. Yields 8 doz. 2"squares.