Mile High Frosting
["1 c. milk", "1/8 tsp. salt", "1/2 c. flour", "1 c. granulated sugar", "1 stick margarine", "1/2 c. Crisco shortening", "1 tsp. vanilla"]
["Slowly add", "milk to flour and salt in small saucepan to make a smooth", "paste.", "Cook", "over", "medium heat, stirring constantly, until thick.", "Cool completely (may be refrigerated). If mixture becomes lumpy, beat until smooth.", "In small bowl of electric mixer,", "cream", "sugar, shortening and margarine until fluffy.", "With mixer running at slow speed, add flour mixture a tablespoon at", "a time.", "Add\tvanilla", "and", "beat at high speed until stiff and fluffy."]
["milk", "salt", "flour", "sugar", "margarine", "shortening", "vanilla"]