Can I make this pie ahead of time?
Yes, and it actually works best this way. Fully assemble the pie (crust, bananas, and warm custard) the day before, then chill overnight. Add the whipped cream the day you serve for the fluffiest topping.
If you really want to make the custard separately, you can, but once it is cold it sets up firm. You will need to whisk it vigorously (a hand whisk or mixer helps) to loosen it before layering, and the texture may be a little less silky.
Why did my custard turn lumpy?
Usually the eggs got too hot too fast. Temper slowly, whisk constantly, and once it is back on the heat, do not stop whisking until it thickens. If lumps happen anyway, pour the hot custard through a fine-mesh sieve.
How do I know when the custard is thick enough?
Look for the first big, slow bubbles (the “blorp” bubbles) and keep whisking while it gently bubbles for about 30 to 60 seconds. It should coat the back of a spoon, and when you drag a finger through, the line should hold. If you like numbers, aim for about 170 to 175°F.
Can I use boxed pudding?
You can, but you will lose the luxurious texture and the citrus pop. If you want a shortcut, use instant pudding plus lemon zest and a pinch of salt, then fold in a little whipped cream for a mousse vibe.
What bananas are best?
Use ripe bananas that are yellow with a few brown freckles. Avoid very green bananas (starchy) and very brown bananas (overly strong, sometimes a little boozy-tasting, and they can take over the custard).
How do I keep bananas from turning brown?
Best trick: assemble the pie so the bananas are fully covered by custard with minimal air contact. If you want extra insurance, toss the slices with a very light hand of lemon juice, or slice bananas right before assembling.
Can this sit out at room temp?
This is a custard pie, so keep it chilled. For food safety, try not to leave it out for more than about 2 hours total (less if the room is warm).