2 (3.4 oz.) pkg. vanilla instant pudding mix
1 (8 oz.) carton sour cream
3 1/2 c. milk
Vanilla wafers
3 lg. bananas
1 (8 oz.) carton frozen whipped topping, thawed

Combine first 3 ingredients in a large bowl; beat at low speed of an electric mixer 2 minutes or until thickened. Line bottom and sides of 3-quart bowl with vanilla wafers. Slice 1 banana and layer over wafers. Spoon 1/3 of pudding mixture over bananas. Repeat layers of vanilla wafers, bananas and pudding twice; chill. Spread whipped topping over custard. Serves 10 to 12.