In a small bowl, cream butter and sugar. Beat in egg. Combine flour and baking soda; add alternately with buttermilk to creamed mixture. Blend in extracts. Pour into a greased 5-3/4x3x2-in. loaf pan. Bake at 350° for 30-35 minutes or until cake tests done. Cool for 10 minutes; remove from the pan to cool on a wire rack.