1 (8 oz.) carton sour cream
2 (3 1/2 oz.) instant vanilla pudding
3 1/2 c. milk
Vanilla wafers
3 bananas
1 (8 oz.) carton Cool Whip

Mix first 3 ingredients until thickened. Layer with vanilla wafers and bananas in large Pyrex dish. Top with Cool Whip. Refrigerate. Good for days.