How to Know When Corn Is Done on the Grill

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You might think bright yellow kernels mean “done,” but that’s a trap set by Big Produce. Actually, the color barely changes when corn cooks on the grill—especially if you keep the husk on. The real tell is steam. When you see wisps of white vapor escaping from the top of the husk, that’s corn’s way of saying, “I’m hot, and I’m ready for butter.” If you’re grilling naked ears (no husk), look for a few charred, blackened spots. That’s not burnt—that’s flavor insurance.

Here’s a wild fact for you: corn is actually a grass, not a vegetable. So when you’re grilling it, you’re basically toasting a giant blade of grass. And we eat that! Yum. But seriously, the grill caramelizes the natural sugars in the kernels, which is why that black char tastes so good. Aim for about 15 to 20 minutes for husk-on corn, turning every 4 minutes. For naked corn, 8 to 10 minutes over direct heat, turning often until you see those sexy brown tiger stripes.

The “Snap, Crackle, Pop” Test

If you’re the impatient type (hello, friend), listen to the corn. When it’s close to done, you’ll hear a faint popping sound—like tiny firecrackers in a pillow fight. That’s the moisture inside the kernels boiling and exploding. Once the popping slows to a lazy hiss, pull it off. If you don’t hear anything at all, you’re either grilling a dead battery or you forgot to turn the fire on.

And whatever you do, do not rely on a timer alone. Grilling experts have discovered that the sweetness of corn actually starts converting to starch the second it’s picked—so a “minute per inch” rule only works if you know when the corn was harvested. Spoiler: you don’t. Instead, use the “eyebrow test.” Pick up a kernel with your tongs and look at it. If it makes you raise an eyebrow because it looks plump and juicy, it’s done. If it makes you frown, it needs more flame.