Gram'S Scottish Shortbread Cookies
["1 lb. butter", "1 c. sugar", "1 tsp. vanilla", "4 1/2 c. flour"]
["Cream butter, sugar and vanilla in large bowl until smooth. Gradually work in flour with a wooden spoon to make a stiff dough; chill 30 minutes.", "Roll out on lightly floured surface to 1/4-inch thickness.", "Cut with cutter, or into squares with a knife.", "Bake about 30 minutes in a 300\u00b0 oven; do not overbake. Store in tightly covered container when cold."]
["butter", "sugar", "vanilla", "flour"]