Whipped Shortbread
["1 c. butter", "1/4 c. cornstarch", "1/2 c. sugar", "1 1/2 c. flour"]
["Mix all ingredients in a bowl and beat for 10 minutes with electric beater. Drop by spoonful on cookie sheet and bake at 300\u00b0 until lightly brown."]
["butter", "cornstarch", "sugar", "flour"]