Carrot Cake Frosting
["1/2 c. milk", "3 Tbsp. flour", "1/2 c. shortening (half butter and half shortening)", "1/2 c. sugar", "1 tsp. vanilla"]
["Bring milk and flour to a boil; this will be very thick.", "Cool. Cream sugar and shortening.", "Add cooled mixture and mix at high speed with mixer; add vanilla.", "Frosting will be light and fluffy."]
["milk", "flour", "shortening", "sugar", "vanilla"]