Shortbread Cookies
["1 lb. butter", "1 c. sugar", "4 c. flour", "1/2 to 1 tsp. vanilla"]
["Cream butter and sugar.", "Gradually add flour and mix in. Shape with hands.", "Pat into 2 cookie sheets.", "Bake at 325\u00b0 to 350\u00b0 for 25 minutes or until golden and lightly brown around edges. Cut into squares."]
["butter", "sugar", "flour", "vanilla"]