In a sauce pan, whisk:
- 1 cup sugar
- 6 T cornstarch
- 3/4 t salt
Then add a little bit at a time and whisk in:
- 9 egg yolks, lightly beaten
- 6.75 cups whole milk
Put the saucepan on medium heat and whisk often until it thickens and starts to bubble. This will take awhile (I started to freak out because it was taking forever), but be careful: it will thicken very suddenly. Once this happens, turn down the heat to low and stir constantly with a rubber spatula. Scrape the bottom and sides constantly. It's done when it makes visible ribbons on top. Turn off the heat at that point, and stir in:
- 1 stick melted butter (1/2 cup)
- 2 T vanilla extract
Line the bottoms of a couple of big baking dishes with a single layer of Nilla wafers followed with a single layer of sliced bananas. Pour the pudding over and cool in the fridge. Let sit for a couple hours so the pudding can soften the cookies.