Ingredients 3 tablespoon butter, or margarine 1/2 cup sugar 1 each egg 1 1/4 cup buttermilk, non-fat 1/4 cup cocoa powder, unsweetened 1/4 teaspoon salt 1 teaspoon baking soda 1 teaspoon baking powder 1 1/2 cup flour, unbleached, sifted Directions: Preheat oven to 375 degrees. Lightly coat an 8-inch round cake pan with non-stick cooking spray. With an electric mixer cream the margarine and sugar in a mixing bowl. Beat in the egg. Stir in the buttermilk. Set the bowl aside. In a large bowl, combine the cocoa, salt, baking soda, baking powder, and flour, and mix together well. Add the creamed margarine-buttermilk mixture to the dry ingredients in one batch. Stir until the dry ingredients are thoroughly moistened. Pour the batter into the prepared pan and smooth the top with a spatula. Bake for 35 minutes, or until a cake tester comes out dry. Remove from the pan and let cool on a rack.