How to Prepare Without a Double BoilerA double boiler helps to keep custards, such as the pudding filling for this recipe, smooth. If you don't have a double boiler, you can make your own by placing a heatproof bowl over a saucepan of simmering water on top of the stove. Be sure to use a bowl that fits snugly over the pan. Most importantly, do not allow the simmering water to touch the bottom of the bowl. Use pot holders when removing the bowl of cooked custard from the saucepan as it will be very hot.
Make AheadPrepare as directed; cool completely. Refrigerate until ready to serve. Top with reserved wafers just before serving.
Special ExtraGarnish with additional banana slices just before serving.