Cream sugars and butter. Add melted chocolate. Beat yolks; add water and vanilla extract and blend. Gradually add yolk mixture to chocolate mixture; beat until light and fluffy. Sift together flour, salt and baking soda. Alternately add flour mixture and milk, blending well after each addition. Beat egg whites until stiff but not dry, fold into batter.
Turn into two greased and floured 9-inch round cake pans or one greased and floured 13x9x2-inch cake pan.
Bake layers or loaf in moderate oven 350°F about 30-35 minutes or until cake springs back when touched lightly.
Turn out on cooling rack. Yield: two 9-inch layers or one 13x9x2-inch loaf.
Serving Size: 8
