Creamy White Frosting
["1/2 c. margarine", "1/2 c. Crisco", "1 c. sugar", "1 c. milk", "1 Tbsp. cornstarch", "1 tsp. vanilla"]
["Beat margarine, shortening and sugar 10 minutes or until sugar is dissolved.", "Cook milk and cornstarch together until thickened. Cool to quite warm, then add to sugar and beat until fluffy.", "Add vanilla."]
["margarine", "Crisco", "sugar", "milk", "cornstarch", "vanilla"]