This is Highly recommended. A friend who vehemently claimed his mother's was the best tried this, and was speechless for a bit. He conceded that it was "as good as mom's." :-)

Mix pudding mix with milk. Fold in half of the whipped topping, all of the sour cream. In large bowl, layer wafers, bananas, pudding mixture. Top with remaining whipped topping. Refrigerate.