2 1/4 c. cake flour
1 1/2 c. sugar
3 tsp. baking powder
1 tsp. salt
1/2 c. salad oil
7 egg yolks
3/4 c. cold water
1 tsp. vanilla
7 egg whites
1/2 tsp. cream of tartar
1/4 c. boiling water
2 tbsp. sugar
2 oz. unsweetened chocolate

Add in well of flour, sugar, salad oil, egg yolks, cold water, and vanilla. Beat until smooth. Beat egg whites until stiff. Pour egg yolk batter in thin stream over entire surface of egg whites, gently folding. Remove 1/3 of batter to separate bowl.

Blend together boiling water, 2 tablespoons sugar and chocolate. Gently fold into batter. In ungreased tube cake pan, alternate light batter with spoonfuls of chocolate batter. With narrow spatula swirl gently to form marble effect.

Bake at 325 degrees for 55 minutes, then at 350 degrees for 10 minutes.