Two-Part Icing
["1 c. milk", "2 Tbsp. cornstarch", "1 c. shortening (Crisco)", "1 c. granulated sugar", "1 tsp. vanilla"]
["Mix milk and cornstarch.", "Cook until thickened; cool.", "Cream shortening and sugar.", "Add cooled mixture and cream."]
["milk", "cornstarch", "shortening", "sugar", "vanilla"]