How to Grill Corn on the Cob on a Charcoal Grill
Sweet, tender and spotted with char — the simple charcoal method for grilled corn, husk-on or husk-off, with timing and temperature.
Corn is the food that makes people fall in love with charcoal. The dry, direct heat caramelizes the sugars in the kernels and spots them with char in a way an oven or a pot of boiling water simply cannot — it is the single easiest thing to grill that tastes dramatically better for having been grilled. Here is the whole method, which takes under 20 minutes.
Husk-on or husk-off?
The one real decision. Husk-off— peeled, oiled, laid straight on the grate — gives you the most char and the smokiest flavor, and it is what most people picture when they think of grilled corn. It takes 8–10 minutes. Husk-on— silk removed, husk folded back over — steams the kernels inside their own wrapper for a more tender, gently smoky result in 12–15 minutes, with less char. For charcoal we lean husk-off, because the char is the entire reason to bother.
The method
Build a medium-hot two-zone fire (see how to set one up): coals over two-thirds of the grill, one third left empty. You want roughly 400°F over the direct side. Oil the corn lightly — oil, not butter, which burns — and lay the ears over the coals.
Turn every 2–3 minutes so every side gets time over the fire. You are looking for kernels that have gone from pale to bright yellow, tender to the bite, and freckled with dark char. If an ear is browning faster than it is cooking, slide it to the cool zone to catch up. Total time is about 8–10 minutes husk-off.
Finishing
Butter burns on the grill, so save it for the end: pull the corn, roll it in butter and salt while it is hot, and it will glaze beautifully. From there, anything goes — a squeeze of lime and chili powder, a dusting of grated cheese, or just salt and pepper. The char does the heavy lifting.
The gear we used
Nothing special: a charcoal grill, a bag of briquettes for a steady medium heat, and a good pair of long tongs to turn the ears without burning your hand. If you are still lighting with fluid, a chimney starter will make everything you grill taste cleaner.
Frequently asked questions
Do you grill corn with the husk on or off?
Both work. Husk-off gives you more direct char and a smokier, grilled flavor in about 8-10 minutes. Husk-on steams the kernels inside the husk for a more tender, less charred result in 12-15 minutes. For charcoal, husk-off is the more popular choice because the char is the point.
How long does corn take on a charcoal grill?
About 8-10 minutes husk-off over a medium-hot direct fire (roughly 400°F), turning every 2-3 minutes for even char. Husk-on takes 12-15 minutes. It's done when the kernels are bright, tender and spotted with char.
Should you soak corn before grilling?
Only if you're grilling husk-on and want to reduce the husk catching fire — a 15-minute soak helps. For husk-off corn there's no need to soak; just oil it lightly and grill directly.
What temperature do you grill corn at?
Medium-hot, around 400°F over direct heat. Hot enough to char the kernels but not so hot the outside burns before the inside is tender. Keep a cooler zone so you can move ears that char too quickly.
Sources
- USDA FSIS — Grilling Food Safely — USDA on safe handling at the grill, using a food thermometer, and the difference between grilling and slower cooking (accessed July 21, 2026)
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