T (plain or self rising) flour
Box Nilla Wafers
Beat egg lightly in sauce pan. Put dry ingredient. Stir in milk gradually. Put on high heat, stir while heating. Before it boils, turn to simmer. Bring to boil, 1 minute; remove from heat and let stand till thick. In another bowl, layer nilla wafers, bananas and repeat (at least 3 layers). Pour sauce over wafers/bananas; cover. Serve with cool whip on top.