Awesome Chocolate Cake
Mix 1/2 cup cocoa and 3/4 cup boiling water in a bowl and set aside.
In a separate bowl, add sour cream and stir in baking soda until dissolved.
Blend 1/2 cup butter and 2 cups sugar in a mixing bowl until creamy.
Gradually beat in sifted flour, cocoa water mixture and the sour cream mixture, alternating between them, until fluffy
Beat the egg whites until stiff.
Combine egg whites and 1 1/2 teaspoons of vanilla into batter.
Pour batter into 9x13 greased baking pan and bake at 300 degrees for about 50 minutes, until inserted toothpick comes out clean.
Begin preparing the frosting by creaming 6 tablespoons butter in a bowl.
Beat in 3/4 cup cocoa, confectioner's sugar and milk.
Add 1 teaspoon vanilla.
Spread frosting over the cake.