Red Velvet Cake Frosting
["2 Tbsp. flour", "1/2 tsp. salt", "1 c. milk", "1 c. shortening", "1 c. sugar", "2 tsp. vanilla"]
["Cook milk, flour and salt until thick, stirring constantly. Let cool.", "(Be sure to cover, so it doesn't form a film on top.) Cream shortening and sugar very well.", "Add vanilla.", "Combine with the first mixture; beat until fluffy.", "Spread on cake."]
["flour", "salt", "milk", "shortening", "sugar", "vanilla"]