The Ice Cube Trick Is Coming for Your Leftovers

This leftover-reheating hack is almost comically simple: just add an ice cube.

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Yes, an actual ice cube.

The trick has been making the rounds online as a way to revive tired leftovers in the microwave without turning them into the sad, dry remains of yesterday’s dinner.

The method is exactly what it sounds like. Put your leftovers in a microwave-safe bowl, place an ice cube on top, cover the bowl, and heat. As the food warms, the ice gradually melts and creates steam, adding moisture back to food that might otherwise come out chewy, crunchy, or somewhat resembling cardboard.

And, unlike a lot of viral kitchen hacks, this one actually has some science behind it.

Why The Ice Cube Trick Works

Microwaves have a particular talent for making leftovers worse.

When you reheat food, you’re not just warming it up. You’re changing its texture. Pasta turns rubbery. Chicken goes tough. Anything that was once perfectly moist can emerge from the microwave looking like it has been personally betrayed. That’s because reheating can drive moisture out of food. The ice cube puts a little back―but the way it does it is stranger than most people assume.

Here’s the counterintuitive part: the cube doesn’t heat as quickly as the food around it. Microwaves heat by exciting water molecules, but the water molecules in solid ice are held in a rigid crystal structure, meaning the frozen cube warms more slowly than the liquid water already present in your food.

As the cube eventually melts, that water can turn into steam, adding moisture to the food as it reheats. When people share this trick, amazed that the ice cube is still sitting there at the end, that’s not magic. It’s just physics being slightly weird.

Covering the bowl is the other half and it’s the part a lot of videos skip it. A lid or plate traps the steam so it actually settles back into your food instead of escaping into your kitchen. Leave the bowl open and you’ve basically put an ice cube on your dinner for no reason.

It’s Basically A Tiny Steam Bath For Your Dinner

The hack is especially handy for pasta, particularly the kind that’s absorbed most of its sauce overnight and fused into one solid, regretful mass. A little extra moisture can help loosen everything back up.

The same principle works on plenty of other dried-out leftovers, though results vary. Anything that has lost moisture in the fridge is a good candidate. Anything crispy is not―steam is the enemy of crunch, and no one wants a soggy French fry.

Is This Actually Better Than Just Adding Water?

Technically, no.

An ice cube is just water. You could splash a little water onto your leftovers directly and get a similar effect.

But there’s something appealing about the ice cube version because it’s harder to overdo. Pour on too much water and you’re suddenly eating soup. An ice cube hands you a small, fixed amount of moisture that releases gradually as it heats.

It’s less “pour water on your dinner” and more “let physics handle it.” And that’s probably why it caught on.

The Internet Loves A Leftover Rescue

The ice cube trick is part of a much bigger obsession with making leftovers taste less like leftovers.

We’ve collectively become invested in reheating food properly―air-frying pizza back to crispness, babying day-old noodles, treating the microwave like a precision instrument instead of a moisture-destroying box. Nobody wants to throw away good food, but nobody wants to eat a sad version of it either. (Just use common sense with the genuinely perishable stuff: the ice cube fixes texture, not freshness, so anything that’s been lurking in the fridge too long should still go in the bin.)

The microwave has spent decades being blamed for ruining leftovers. Maybe all it needed was an ice cube.

So next time you open the fridge and find yesterday’s dinner staring back at you, don’t give up on it just yet. Grab an ice cube.

There might be one more good meal in there.