4 to 6 ripe bananas
1 (8 oz.) carton sour cream
1 box vanilla wafers
2 sm. pkgs. instant vanilla pudding
2 c. milk
1 lg. container Cool Whip

Mix milk and pudding. Blend sour cream and Cool Whip (except 1/3 Cool Whip for topping). Mix both together well. Layer wafers, bananas, and mixture. Top with remaining Cool Whip. Keep refrigerated.