Red Velvet Cake
["2 to 3 Tbsp. cocoa", "2 oz. red food coloring", "1/2 c. margarine", "1 1/2 c. sugar", "2 eggs", "2 1/4 to 2 1/2 c. sifted flour", "1/2 to 3/4 tsp. salt", "1 c. buttermilk or 1 c. sour milk", "1 tsp. vanilla", "1 tsp. vinegar", "1 to 1 1/2 tsp. soda"]
["Make a paste of cocoa and food coloring.", "Cream margarine and sugar; add eggs.", "Combine sifted flour with salt.", "Divide flour into three parts and milk into 2 parts.", "Add alternately to cream mixture, beginning with and ending with flour.", "Beat well after each addition.", "Add vanilla.", "If using an electric mixer, remove and fold in vinegar and soda carefully.", "Pour mixture in equal portions into two 9-inch pans that have been greased and floured lightly.", "Bake at 350\u00b0 to 375\u00b0 for 25 to 30 minutes."]
["cocoa", "red food coloring", "margarine", "sugar", "eggs", "flour", "salt", "buttermilk", "vanilla", "vinegar", "soda"]