How to Tell If Corn on the Cob Has Gone Bad

Corn on the cob has gone bad if it smells rancid, feels slimy after shucking, or shows mold or discoloration on the kernels. Brown or dry husks alone are not a discard signal, the real spoilage signs only appear once the husk is off.

The Husk Is Lying to You

Dry, brown, or slightly papery husks look alarming but mean almost nothing on their own. What you actually want to check, per Tasting Table:

• The silk. Pale yellow or slightly brown is fine. Dark brown or black silk that feels mushy is not.
• The husk color. A bright green, tight husk that feels slightly damp signals freshness. Corn that feels heavy for its size is juicy inside.
• The tip. If the top of the ear is moist and darkening, mold may be forming there. If it’s spread beyond the tip, toss the whole ear.

Pull the husk back an inch before you buy.

Thirty seconds of checking saves you from a second trip to the grocery store.

Signs Corn on the Cob Has Gone Bad After Shucking

Once the husk is off, the verdict is quick. Slimy kernels, a sour or rancid smell, or mold that doesn’t rinse away means it’s done. Consuming spoiled corn can cause foodborne illness.

One sign people miss entirely: if you’ve cut corn off the cob and it starts leaking a milky liquid, that’s the corn breaking down. Once it’s sitting in that puddle, it’s no good. Time to toss it.

Finding a worm inside? Discard the ear. Missing a few kernels in a spot is just a growth quirk, totally normal. An actual worm is not.

How Long Does Corn Actually Last?

Unhusked corn lasts up to two days in the fridge crisper drawer. Unhusked corn stored in your fridge crisper drawer lasts up to two days before you should cook it or cut your losses, per The Takeout. At $1–$2 an ear, that’s a fast way to lose $6 on a six-pack of corn you bought for a cookout that got rained out.

Corn eaten closest to harvest is sweeter and holds up longer, per The Takeout, which is your reminder that the corn at a peak-summer farmers market and the corn that’s been in the store cooler since Tuesday are not the same product.

The best way to store corn on the cob short-term is unhusked in the fridge crisper drawer; for anything beyond two days, blanch and freeze.

You can pull them out months later and they’re still genuinely good. Two minutes of work now beats a soggy ear in the trash next week.

Pantidy, available on iOS and Android, tracks expiration dates across your fridge and flags what needs to be used first, so your corn doesn’t quietly expire behind the leftover takeout containers while you forget it exists. 14-day free trial.

Corn pairs well with peak-summer produce, check what’s in season right now if you’re planning a full spread, or the best onions for grilling if corn is making it onto the grill tonight.

If remembering what’s in your fridge is the actual problem, Pantidy tracks it for you. Free for 14 days.

Frequently Asked Questions

How do I know if corn on the cob has gone bad?

Pull the husk back and check the kernels: sliminess, a rancid or sour smell, or visible mold means it’s done. Dark brown or black silk that feels mushy is also a discard signal, per Tasting Table. Brown dry husks on the outside, by themselves, are not.

Is corn bad if the husk is brown?

Not automatically. The husk is the wrapper, not the corn. Peel it back an inch and check the silk and kernels directly. Brown husks with fresh, firm, odor-free kernels underneath are fine to eat.

How long does corn on the cob last in the fridge?

Unhusked corn lasts up to two days in the fridge crisper drawer before you should cook it or freeze it, per The Takeout. The closer to harvest you eat it, the sweeter and longer-lasting it is.

Can you eat corn if there’s mold on the silk?

No. Mold on the silk or husks is a sign to discard the ear immediately, per Tasting Table. Silk mold can spread to the kernels even if you can’t see it yet.

What does it mean if cut corn is leaking a milky liquid?

It means the corn is breaking down and should be thrown out. Once cut corn is sitting in that milky liquid, it’s past the point of saving. That’s a definitive spoilage sign, not a rinse-and-use situation.

Is corn bad if it’s slimy?

Yes. Slimy kernels that don’t rinse clean are a definitive spoilage sign, per Tasting Table. Sliminess on the outside of the husk is less conclusive, but sliminess on the kernels themselves means toss it.

Today’s action: Before dinner, take ten seconds and pull back the husk on any corn sitting in your fridge. If the kernels are firm and smell like corn, you’re good. If they don’t, now you know, and you didn’t find out at the table.