Marble Cake

Directions

1. 1
   Stir cocoa, sugar, food coloring and boiling water.
2. 2
   Stir until smooth; set aside and let cool.
3. 3
   Sift together flour, sugar, baking powder, egg yolks, oil, cold water and vanilla into mixing bowl; beat until smooth.
4. 4
   Spoon or beat for 1 minute.
5. 5
   Measure into large bowl egg whites (7 or 8 eggs) and cream of tartar.
6. 6
   Beat until egg whites are stiff peaks.
7. 7
   Pour egg yolk mixture gradually over beaten whites, gently folding with rubber scraper just until blended.
8. 8
   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).
9. 9
   Immediately pour alternate layers of dark and light mixtures into ungreased tube pan.
10. 10
    Bake at 325° for 55 minutes.
11. 11
    Use desirable icing.