In a large mixing bowl, combine the cake mix, pudding mix, eggs, oil and soda. Beat on low speed for 30 seconds; beat on medium for 2 minutes.
Pour into a greased and floured 10-in. fluted tube pan. Bake at 350° for 45-50 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pan to a wire rack to cool completely. Dust with confectioners' sugar if desired. Yield: 12 servings.