Cream together 2/3 cup butter, 1 1/2 cups sugar, 3 eggs, and 1 teaspoon vanilla; beat well. Sift 2 1/4 cups flour, 1/4 teaspoon salt, 1/2 cup cocoa, 1 teaspoon baking soda, and 1 teaspoon baking powder. Mix alternately with 1 cup water. Stir in 2/3 cup rinsed, drained, and chopped sauerkraut. Bake at 350 degrees in 2 (8 inch) cake pans for 30 minutes or until done. (I use a 9 x 13 inch pan). No one can guess it has sauerkraut in it (delicious).