Though it's not difficult to make, this dessert does take some time. Definitely worth the wait as this is insanely delicious and I can see why it's so popular! The recipe is included in a wonderful cookbook by Allysa Torey, "More From Magnolia".
The pudding starts out by mixing together some sweetened condensed milk, ice water and instant vanilla pudding. Cover and refrigerate for 3-4 hours or overnight until it is set.



To assemble the dessert, select a large, wide bowl (preferably glass) with a 4-5-quart capacity, like a trifle bowl. Arrange 1/3 of a 12 oz box of Nilla Wafers (no substitutions!), some sliced ripe banana, and 1/3 of the pudding. Repeat this layering twice more, garnishing the top with additional Nilla Wafers or wafer crumbs on the top layer.