Scotch Shortbread
["3/4 lb. salted butter, softened", "1 c. confectioners sugar", "3 c. flour"]
["Set oven slow at 300\u00b0 to 325\u00b0.", "Cream butter.", "Add sugar gradually; beat until fluffy.", "Sift flour into creamed mixture thoroughly; blend, using hands.", "Press into oblong cookie sheet lined with aluminum foil.", "Prick surface with fork.", "Bake in preheated oven for about 1/2 hour, or until firm when pressed gently in center.", "Should be only light brown."]
["butter", "confectioners sugar", "flour"]