Whole-Wheat Chocolate Cake

Whole-Wheat Chocolate Cake
 
 1 1/2 cups Sugar
 1 cup Flour,  Unbleached, Sifted
 3/4 cup Whole Wheat Flour, Stirred
 2 teaspoons Baking Soda
 1 teaspoon Salt
 1 cup Butter Or Regular Margarine
 1 cup Water
 1/4 cup Cocoa, Baking
 2 Eggs; Large, Beaten
 1/2 cup Sour Cream
 COCOA FROSTING
 1/2 cup Butter Or Regular Margarine
 6 teaspoons Milk
 1/4 cup Cocoa, Baking
 1 pound Confectioners Sugar (1 Box)
 1 teaspoon Vanilla Extract

Instructions:

Stir together sugar, flour, whole wheat flour, baking soda and salt in a mixing bowl. Combine butter, water and cocoa in saucepan. Bring mixture to a boil, stirring constantly. Remove from heat. Pour into flour mixture. Mix well, using wooden spoon. Blend in eggs and sour cream, mixing well. Pour batter into greased 13 x 9 x 2-inch baking pan. Bake in preheated 375ºF.  oven 30 minutes or until cake tests done. Cool in pan on rack. Meanwhile prepare Cocoa Frosting. Pierce warm cake with fork. Pour Cocoa Frosting over all. Cool completely. Cut into squares. COCOA FROSTING: Combine butter, milk, and cocoa in saucepan. Cook over medium heat until butter is melted and mixture is smooth. Stir in confectioners sugar, that has been sifted. Continue cooking over low heat until confectioners sugar is completely dissolved. Remove from heat. Stir in vanilla. Frost cake immediately. 

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