Red Velvet Frosting
["4 Tbsp. cornstarch", "1 c. sugar", "8 oz. whipped margarine (Blue Bonnet or Parkay)", "1 c. cold water", "1 tsp. vanilla"]
["Cook water and cornstarch (stirring constantly until thick). Remove from heat and let stand until cold.", "Add sugar, vanilla and margarine.", "Beat with electric mixer until smooth.", "Spread on cool cake."]
["cornstarch", "sugar", "whipped margarine", "cold water", "vanilla"]