Old-Fashioned Tea Cakes With Chocolate Icing
["1/2 c. margarine", "1/2 c. shortening", "2 c. sugar", "3 eggs", "1/3 c. buttermilk", "2 tsp. vanilla", "5 c. plain flour", "2 tsp. baking powder", "1 tsp. baking soda", "1/2 tsp. salt"]
["Mix the first 4 ingredients.", "Mix buttermilk and vanilla.", "Mix dry ingredients.", "Add buttermilk and dry ingredients alternately; mix well.", "Roll out on floured cloth and cut.", "Bake at 375\u00b0 on foil-covered cookie sheet until lightly browned."]
["margarine", "shortening", "sugar", "eggs", "buttermilk", "vanilla", "flour", "baking powder", "baking soda", "salt"]