1. | Beat egg whites until stiff in a separate bowl. |
2. | Cream sugar and margarine. |
3. | Add egg yolks one at a time while mixing. |
4. | Alternate flour and sour cream. |
5. | Add vanilla and lemon juice. |
6. | Pour batter into a greased tube pan. |
7. | Bake at 300 degrees for 1-1/2 hours. |