Frosting
["1 heaping Tbsp. cornstarch", "1 c. milk", "1/2 lb. butter", "1 c. granulated sugar", "1 tsp. vanilla"]
["Cook the cornstarch and milk until thick, stirring constantly. Cool.", "Beat the butter until creamy.", "Add sugar and vanilla.", "The mixture will be grainy until you add the cornstarch mixture.", "Add the cornstarch mixture; beat until smooth and fluffy."]
["cornstarch", "milk", "butter", "sugar", "vanilla"]