cream butter and sugar together. add eggs 1 at a time letting each beat for about 1 min. add extract one at a time. mix flour, baking powder, baking soda, and salt by sifting together into a large bowl. add flour mixture and sour cream alternating between the two. Pour batter into greased and floured flute pan. Bake on 350 degrees F for about 1 hour and 15 min