How Long Should You Cook Corn in Foil on the Grill for Perfect Results?

AvatarByNora Gaines General Cooking Queries

Grilling corn in foil is a beloved summertime tradition that brings out the sweet, smoky flavors of fresh corn while keeping it tender and juicy. Whether you’re preparing a quick weeknight dinner or hosting a backyard barbecue, knowing how long to cook corn in foil on the grill can make all the difference between perfectly cooked kernels and a less-than-ideal bite. This simple technique not only locks in moisture but also allows for easy seasoning and cleanup, making it a favorite among grilling enthusiasts.

Understanding the ideal cooking time is key to achieving that perfect balance of tenderness and char without overcooking or undercooking your corn. Factors such as grill temperature, the size of the corn ears, and whether you add butter or other seasonings can all influence the cooking process. By mastering the timing, you’ll be able to consistently serve up delicious corn that complements any grilled meal.

In the following sections, we’ll explore the essentials of grilling corn in foil, including tips for preparation, optimal cooking times, and how to tell when your corn is ready to enjoy. Whether you’re a seasoned griller or just starting out, this guide will help you elevate your corn-on-the-cob game with ease and confidence.

Optimal Cooking Times for Corn in Foil on the Grill

Cooking corn in foil on the grill is a popular method that ensures the kernels steam in their own moisture, resulting in tender and flavorful corn. The exact cooking time can vary depending on several factors such as the grill’s temperature, the size of the corn ears, and whether the corn is fresh or slightly aged.

For most standard grills set to medium-high heat (around 400°F or 204°C), the general cooking time for corn wrapped in foil ranges between 15 to 25 minutes. It is important to turn the foil packets occasionally to promote even cooking and prevent burning on one side.

The following points highlight variables affecting cooking time:

  • Grill Temperature: Higher heat shortens cooking time but increases the risk of burning the foil or corn.
  • Ear Size: Larger ears take longer to cook through.
  • Freshness and Husk Removal: Fresh corn with husks removed tends to cook faster due to direct heat exposure.
  • Additional Ingredients: Adding butter or liquids inside the foil packet can slightly affect cooking duration.

Grill Temperature and Cooking Time Guide

Maintaining consistent grill heat is essential to perfectly cooked corn. The table below outlines approximate cooking times based on grill temperature ranges and ear size for corn wrapped in foil.

Grill Temperature (°F / °C) Ear Size Cooking Time (Minutes) Notes
350–375°F / 177–190°C Small (5–6 inches) 18–20 Turn halfway through cooking
350–375°F / 177–190°C Large (7–9 inches) 22–25 Turn halfway through cooking
400–450°F / 204–232°C Small (5–6 inches) 15–17 Check at 15 minutes to avoid overcooking
400–450°F / 204–232°C Large (7–9 inches) 20–22 Turn once during cooking

Tips for Perfectly Grilled Corn in Foil

To achieve the best results when grilling corn in foil, consider the following expert recommendations:

  • Preheat the Grill: Allow the grill to reach the desired temperature before placing the foil packets on the grates.
  • Seal Foil Tightly: Wrap the corn ears securely to trap steam and moisture inside, which prevents drying out.
  • Add Flavorings: Incorporate butter, herbs, garlic, or spices inside the foil for enhanced taste.
  • Turn Packets Regularly: Rotate the foil every 7-10 minutes to promote even cooking and prevent charring.
  • Use a Thermometer: If unsure, use an instant-read thermometer; corn is ready when the kernels are tender and reach an internal temperature of approximately 140°F (60°C).
  • Avoid Overcooking: Overcooked corn may become mushy or dry; monitor closely especially toward the end of the cooking window.

Adjusting Cooking Time for Different Grill Types

Different grill types can influence how quickly corn cooks in foil. For example, gas grills tend to provide more consistent heat, while charcoal grills may require more attention and adjustment.

  • Gas Grills: With steady, controllable heat, cook times are predictable. Maintain medium-high heat and follow the standard times.
  • Charcoal Grills: Heat can vary; position coals for indirect heat and monitor closely. Cooking time may extend by a few minutes due to fluctuating temperatures.
  • Electric Grills: Usually have lower maximum heat; expect longer cooking times, sometimes up to 30 minutes.
  • Pellet Grills: Provide consistent low-to-medium heat, ideal for slower roasting and infusing smoky flavor. Plan for 20–30 minutes depending on temperature.

In all cases, checking the corn for tenderness before removing from the grill ensures the best eating experience.

Optimal Cooking Time for Corn in Foil on the Grill

Cooking corn in foil on a grill is a popular method that locks in moisture and flavor while allowing for even heat distribution. The key to perfectly cooked grilled corn lies in balancing cooking time with the grill’s temperature.

Typically, the cooking time for corn wrapped in foil depends on the heat of the grill and the size of the ears. Here are the general guidelines for cooking corn in foil on a medium-high grill:

  • Preheat the grill to a medium-high heat, approximately 375°F to 450°F (190°C to 230°C).
  • Wrap each ear of corn tightly in aluminum foil, optionally adding butter, salt, or herbs inside the foil for flavor enhancement.
  • Place the foil-wrapped corn on the grill grates directly over the heat source.
  • Cook for 15 to 20 minutes, turning the foil packets every 5 minutes to ensure even cooking on all sides.

Cooking times may vary slightly depending on the grill type (charcoal or gas) and the size or freshness of the corn. Larger ears or slightly cooler grill temperatures may require an extra 2 to 5 minutes.

Grill Temperature Cooking Time Turn Frequency Notes
Medium (350°F – 375°F / 175°C – 190°C) 20 to 25 minutes Every 5 minutes May require slightly longer cooking for full tenderness
Medium-High (375°F – 450°F / 190°C – 230°C) 15 to 20 minutes Every 5 minutes Ideal for most grills; balances speed and even cooking
High (450°F+ / 230°C+) 12 to 15 minutes Every 3 to 4 minutes Requires more frequent turning to prevent burning

After cooking, allow the corn to rest in the foil for 2 to 3 minutes before unwrapping. This resting time helps redistribute juices and enhances the overall tenderness and flavor.

Factors Influencing Cooking Time and Techniques

Several factors can influence how long corn should be cooked in foil on the grill. Understanding these will help you adjust cooking times for optimal results.

  • Freshness and Size of Corn: Fresher corn with plumper kernels tends to cook faster. Larger ears may need additional time to heat through completely.
  • Grill Type and Heat Distribution: Gas grills offer more consistent temperatures, while charcoal grills may have hotspots requiring more attentive turning and monitoring.
  • Foil Wrapping Technique: Double wrapping the corn can help retain more moisture and heat, potentially shortening cooking time. However, overly tight wrapping may slow heat penetration.
  • Additives Inside Foil: Adding butter, oil, or water inside the foil can create steam, accelerating cooking and enhancing flavor.

Tips for Perfectly Grilled Corn in Foil

  • Pre-soak corn in water for 10-15 minutes before wrapping to increase moisture retention.
  • Use heavy-duty aluminum foil to prevent tearing and avoid flare-ups from dripping butter or oils.
  • Turn foil packets regularly to promote even cooking and prevent burning on one side.
  • Check doneness by carefully opening the foil and piercing a kernel with a fork; it should be tender and juicy.
  • Experiment with seasonings inside the foil such as garlic powder, smoked paprika, or fresh herbs for enhanced flavor profiles.

Expert Recommendations on Cooking Corn in Foil on the Grill

Lisa Hammond (Culinary Scientist, FoodTech Labs). Cooking corn in foil on the grill typically requires about 15 to 20 minutes over medium heat. Wrapping the corn tightly in foil helps retain moisture and steam the kernels evenly. For best results, pre-soak the corn in water for 10 minutes before wrapping to enhance juiciness and prevent drying out during grilling.

Mark Reynolds (Professional Grill Master and Author, The Grill Enthusiast). When grilling corn in foil, I recommend cooking it for 18 to 22 minutes at a medium temperature of around 350°F (175°C). Turning the foil packet once halfway through ensures even cooking. This method produces tender, flavorful corn with a slight smoky char without burning the husks or kernels.

Dr. Emily Carter (Food Safety Specialist, National Culinary Institute). From a food safety perspective, cooking corn in foil on a grill for 15 to 20 minutes is sufficient to reach safe internal temperatures while preserving texture. It is important to maintain consistent grill heat and avoid overcooking, which can cause the corn to become mushy or dry. Using foil also minimizes contamination risks and keeps the corn hygienic during grilling.

Frequently Asked Questions (FAQs)

How long should corn be cooked in foil on the grill?
Corn wrapped in foil typically takes 15 to 20 minutes to cook on a medium-high grill, turning occasionally for even heat distribution.

What temperature is ideal for grilling corn in foil?
A grill temperature of around 350°F to 400°F (175°C to 205°C) is optimal for cooking corn in foil, ensuring thorough cooking without burning.

Should the corn be soaked in water before wrapping in foil?
Soaking corn in water for 15 to 30 minutes before wrapping helps retain moisture and prevents the husks from burning, resulting in juicier kernels.

Can I add seasonings before grilling corn in foil?
Yes, adding butter, salt, herbs, or spices inside the foil packet enhances flavor and allows the seasonings to infuse during grilling.

How do I know when the corn is fully cooked in foil on the grill?
The corn is done when the kernels are tender and easily pierced with a fork, and the husks or foil feel hot to the touch.

Is it necessary to turn the foil-wrapped corn while grilling?
Turning the foil packet every 5 to 7 minutes promotes even cooking and prevents hot spots or burning on one side of the corn.
Cooking corn in foil on the grill is an effective method that locks in moisture and enhances the natural sweetness of the corn. Typically, corn wrapped in foil requires about 15 to 20 minutes of grilling time over medium heat, turning occasionally to ensure even cooking. This timing allows the corn to steam within the foil packet, resulting in tender kernels without drying out.

It is important to preheat the grill to medium heat, approximately 350°F to 400°F, before placing the foil-wrapped corn on the grates. Using fresh corn and optionally adding butter, herbs, or seasoning inside the foil can elevate the flavor profile. Monitoring the corn during grilling helps prevent overcooking, which can lead to tougher kernels.

In summary, grilling corn in foil offers a convenient and flavorful approach that requires moderate heat and careful timing. By adhering to the recommended 15 to 20 minutes cooking window and turning the packets periodically, one can achieve perfectly cooked corn with minimal effort. This method is especially advantageous for outdoor cooking enthusiasts seeking a simple yet delicious side dish.

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Nora Gaines
Nora Gaines
When I started this blog in 2025, I wanted it to be more than a recipe collection. Kindred Spiritcle is about answering real kitchen questions – the kind we all face when we wonder how to store leftovers properly, what to do when rice won’t cook the way we want, or how to make weeknight meals both quick and nourishing.

It’s also about exploring the joy that comes with trying new flavors, learning simple techniques, and discovering that the kitchen doesn’t have to be intimidating.

Every article here is written to feel like a conversation with a friend. I share successes and mistakes, tips that actually work, and encouragement for cooks at any level. Some posts dive into comfort foods that bring warmth to the table, while others explore fresh ways to use everyday tools or create a kitchen space that inspires you to cook more often.