Red Velvet Cake
["2 oz. red food coloring", "4 1/2 Tbsp. cocoa", "3/4 c. butter", "2 1/4 c. sugar", "3 eggs", "3 1/2 c. cake flour", "1 1/2 tsp. salt", "1 1/2 tsp. baking soda", "1 1/2 c. buttermilk", "1 1/2 tsp. vanilla", "1 1/2 tsp. vinegar"]
["Mix food coloring and cocoa.", "Let stand.", "Cream butter and sugar.", "Add eggs, then coloring and cocoa mixture.", "Beat well."]
["red food coloring", "cocoa", "butter", "sugar", "eggs", "cake flour", "salt", "baking soda", "buttermilk", "vanilla", "vinegar"]