Banana Cake #5

INGREDIENTS:

1/2 c Margarine
1 c Sugar
1/2 c Egg Beaters 99% egg
-substitute
1 c Mashed bananas
1/2 ts Vanilla
1/2 c Sour cream
2 c Flour; sifted
1 ts Baking powder
1 ts Baking soda
1/4 ts Salt