Cream margarine; add sour cream. Then add sugar, 1/2 cup at a time. Mix flour and soda. Add flour mixture, 1/2 cup at a time, alternately with eggs, finish with egg. Beat well after each addition. Stir in flavoring and coconut. Bake in greased 10-inch tube pan at 300~ for 1 hour and 45 minutes to 2 hours. ----