You want to combine the sugar, flour, and salt in a medium saucepan. Next, add the eggs and make sure you stir well. You want gradually stir in the milk and cook over low heat. You can use two cups of milk if you like or use 1 cup of milk and 1 cup of heavy whipping cream like I did. You don’t want to cook it too fast, and you want to make sure you are stirring consistently. When the mixture begins to thicken, remove it from the stove’s eye and continue to stir, allowing it to cool slightly. Next, you want to stir in the vanilla and butter until it is smooth.
Step two is my favorite steep, layering. You are going to take a serving dish (perhaps an 8 or 9-inch square dish). I put the bananas on the bottom, and then I layered two cookies on top of each banana. Once again, I love cookies. You don’t have to double up as I did. One layer of cookies is fine. After I did my layers, I poured the sauce mix on top and made sure the sauce reached the bottom. You can place the dish in the fridge for an hour to cool. I put my dish in the freezer for about 20 mins to chill and then let it rest in the refrigerator until I was ready to serve it.