Scotch Shortbread
["1 1/2 c. sifted flour", "1 1/2 c. sifted confectioners sugar", "1 c. margarine"]
["Sift flour and sugar.", "Cut in margarine until crumbly.", "Work into ball and knead 10 minutes.", "Pat dough into 2 1/4-inch thick 14 x 12-inch rectangle, on ungreased cookie sheet.", "Cut into 2-inch diamonds or squares with sharp knife.", "Bake at 300\u00b0 for 45 minutes. Re-cut cookies and separate very carefully.", "Remove from baking sheet.", "Handle carefully.", "Store with paper between layers in airtight container.", "Lasts well for weeks."]
["flour", "confectioners sugar", "margarine"]