1 c. butter
1/2 c. powdered sugar
2 tbsp. corn starch
2 c. sifted flour

Beat butter and sugar until very light and fluffy. Add cornstarch and flour and mix like pie crust dough. Form into small balls and press down with a fork, to about 1/4 inch thick. Prick with the fork to prevent bubbles. Bake in slow oven (250 to 300 degrees) until delicate brown and dried, about 20 minutes.