Marble Cake
["1/4 c. cocoa", "1/4 c. white sugar", "1/4 c. water", "1/4 c. red food color", "2 1/2 c. Softasilk cake flour", "1 1/2 c. sugar", "3 tsp. baking powder", "5 egg yolks", "1/2 c. cooking oil", "3/4 c. cold water", "2 tsp. vanilla", "1/2 tsp. cream of tartar"]
["Stir cocoa, sugar, food coloring and boiling water.", "Stir until smooth; set aside and let cool.", "Sift together flour, sugar, baking powder, egg yolks, oil, cold water and vanilla into mixing bowl; beat until smooth.", "Spoon or beat for 1 minute.", "Measure into large bowl egg whites (7 or 8 eggs) and cream of tartar.", "Beat until egg whites are stiff peaks.", "Pour egg yolk mixture gradually over beaten whites, gently folding with rubber scraper just until blended.", "Place 1/2 the batter in another pan or bowl and pour cocoa mixture gradually into it (will go to the bottom of cake pan if mixture is not cool).", "Immediately pour alternate layers of dark and light mixtures into ungreased tube pan.", "Bake at 325\u00b0 for 55 minutes.", "Use desirable icing."]
["cocoa", "white sugar", "water", "red food color", "Softasilk cake flour", "sugar", "baking powder", "egg yolks", "cooking oil", "cold water", "vanilla", "cream of tartar"]