How Long To Cook Corn On The Cob Grill

ByLily

Grilled corn on the cob develops char marks and a nutty flavor that pair well with butter and salt. If you want to know how long to cook corn on the cob grill, the short answer is 10 to 15 minutes over medium-high heat. That timing works for husked corn, husk-on corn, and foil-wrapped corn, with small changes based on your setup.

This guide breaks down exact times, heat levels, and simple steps so your corn comes off the grate tender and slightly smoky every time.

How Long To Cook Corn On The Cob Grill

Total grill time depends on how you prep the corn. Here is the quick breakdown.

  • Husked corn (direct heat): 10 to 12 minutes
  • Husk-on corn (direct heat): 15 to 20 minutes
  • Foil-wrapped corn: 15 to 20 minutes
  • Pre-boiled corn (quick char): 5 to 7 minutes

Flip the corn every 3 to 4 minutes. That keeps each side from burning and gives you even char marks.

Grill Temperature And Heat Setup

Medium-high heat is the sweet spot. You want the grate at about 400°F to 450°F.

  • Gas grill: preheat on high for 10 minutes, then turn burners to medium-high
  • Charcoal grill: light a full chimney, then spread coals in an even layer
  • Pellet grill: set to 425°F and let it fully preheat

If your grill runs hot, move the corn to a cooler zone after the first few minutes. A little char is good. A blackened husk is not.

Husked Corn Timing

Husked corn cooks fast because the kernels touch the grate directly. Expect 10 to 12 minutes total.

  1. Shuck the corn and remove all silk.
  2. Brush each ear with oil or melted butter.
  3. Place corn directly on the grate.
  4. Turn every 3 to 4 minutes until you see light char spots.
  5. Pull the corn when kernels are tender and slightly browned.

Do not walk away. Husked corn can go from perfect to burnt in under two minutes.

Husk-On Corn Timing

Husk-on corn steams inside its own wrapper. This method takes 15 to 20 minutes.

  1. Pull the husks back and remove the silk.
  2. Soak the corn in water for 10 to 15 minutes.
  3. Pull the husks back up and tie the tips with twine if needed.
  4. Grill over medium-high heat, turning every 4 to 5 minutes.
  5. Remove when the husks are charred and the kernels feel soft through the leaves.

The soak step matters. Dry husks catch fire fast and burn before the corn cooks through.

Foil-Wrapped Corn Timing

Foil packets work like a mini oven. Cook time is 15 to 20 minutes.

  1. Shuck the corn and remove the silk.
  2. Add butter, salt, and pepper to each ear.
  3. Wrap tightly in heavy-duty foil.
  4. Grill over medium heat, turning every 5 minutes.
  5. Open one packet at 15 minutes to check tenderness.

Foil gives you soft, buttery kernels but less char. If you want grill marks, open the foil for the last 3 minutes.

How To Tell When Corn Is Done

Use these signs instead of guessing.

  • Kernels look bright yellow and glossy
  • A fork or skewer slides in with little resistance
  • The corn smells sweet and toasted
  • Char spots are golden brown, not black

Overcooked corn turns shriveled and chewy. Pull it a minute early if you are unsure.

Common Mistakes To Avoid

  • Grilling cold corn straight from the fridge. Let it sit out for 10 minutes first.
  • Using high heat the whole time. Medium-high is enough.
  • Skipping the oil. Dry kernels stick and burn.
  • Forgetting to rotate. One side always cooks faster.
  • Leaving the grill lid open too long. Closed lid keeps heat steady.

Tips For Better Grilled Corn

  • Choose fresh corn with tight green husks and brown silk.
  • Brush with a mix of butter, garlic, and lime for extra flavor.
  • Grill extra ears. Cold grilled corn makes a great salad the next day.
  • Season after grilling so the salt does not draw out moisture early.
  • Keep finished corn in foil while the rest cooks.

Quick Recap

Husked corn takes 10 to 12 minutes. Husk-on and foil-wrapped corn take 15 to 20 minutes. Cook over medium-high heat and turn every few minutes. Check for tender kernels and light char, then serve right away with butter and salt.

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