How to Bring Stale Popcorn Back

Popcorn is what movie nights and match nights run on, and it is also one of the easiest things to waste. A bowl left out overnight turns soft and chewy — whether it came from a bag or you popped it yourself.

It does not have to go in the bin. Stale popcorn is not spoiled popcorn; it has simply absorbed moisture from the air. Drive the moisture back out and the crispness returns.

The method

Spread the popcorn on a sheet pan in a single layer. Piled up, the pieces in the middle steam instead of drying.

Bake at 250°F for about 5 minutes.

Low and slow, not hot and fast. Popcorn burns quickly and there is almost no visual warning before it does — it goes from fine to acrid in under a minute at high heat.

Check it at 3 minutes. Ovens vary and so does how stale the popcorn was.

Take it out while it still feels slightly warm rather than hot, and let it cool for a minute. It crisps as it cools, the same way a biscuit does.

Finishing it

Sprinkle with fine salt. Coarse salt slides straight off popcorn — if you only have coarse, crush it between your fingers first.

For butter: melt it in a small pan and drizzle it over, tossing with a wooden spoon as you go.

Better still, clarify it. Regular melted butter is about 15 percent water, and that water is exactly what you just spent five minutes removing. Melt the butter, skim the foam, and pour off the clear fat, leaving the milky solids behind. Clarified butter gives you the flavor without softening the popcorn again.

Variations

Savory: smoked paprika, garlic powder, grated Parmesan, chili flakes, or za’atar.

Sweet: a light drizzle of honey, or a dusting of cinnamon sugar. Toss it immediately while the popcorn is still warm, or the sugar will not stick.

Keeping it crisp in the first place

Popcorn goes stale because of humidity, not age. Store it in an airtight container, not a bowl covered in plastic wrap, and keep it away from the stove and the sink.