Whole Onions for the Grill

Transform your barbecue game with this simple yet flavorful recipe for Whole Onions for the Grill. This dish elevates ordinary onions into tender, caramelized treasures that are infused with the rich flavors of olive oil, butter, and optional hints of fresh rosemary. Perfectly cooked in foil pouches over indirect heat, these onions become meltingly soft with a smoky edge, making them an irresistible side dish or burger topping. With minimal prep and just a few simple ingredients, this grill-friendly recipe delivers maximum flavor with minimal effort. Ideal for summer cookouts or any backyard gathering, these grilled onions are sure to impress.

Nutriscore Rating: 74/100

Prep Time:10 mins

Cook Time:45 mins

Total Time:55 mins

Servings: 4

Ingredients

• 4 pieces large onions
• 4 teaspoons olive oil
• 2 tablespoons butter
• 1 teaspoon kosher salt
• 1 teaspoon black pepper
• 2 sprigs fresh rosemary (optional)
• 4 pieces aluminum foil sheets

Directions

Step 1

Preheat the grill to medium-high heat (about 375–400°F).

Step 2

Peel the onions, making sure to keep their outer layers intact to hold their shape during cooking.

Step 3

Slice off a small part of the root end to make a flat base so the onions can sit upright.

Step 4

Using a sharp knife, carefully cut a deep X into the top of each onion, going about halfway down. Be careful not to cut through the bottom.

Step 5

Place each onion on a piece of aluminum foil large enough to fully wrap it.

Step 6

Drizzle 1 teaspoon of olive oil over the top of each onion, letting it seep into the cuts.

Step 7

Add 1/2 tablespoon of butter in the center of the cut in each onion.

Step 8

Sprinkle all sides of the onions with kosher salt and black pepper. If desired, tuck a small piece of rosemary into the cuts for an herbal flavor.

Step 9

Wrap each onion tightly in its piece of aluminum foil, sealing the edges to trap in the steam and flavors.

Step 10

Place the foil-wrapped onions directly on the grill grates over indirect heat. Close the grill lid.

Step 11

Cook for 40–45 minutes, rotating the onions occasionally to ensure even cooking.

Step 12

Carefully remove the onions from the grill and let them rest for 5 minutes before unwrapping.

Step 13

Unwrap the onions and serve hot as a side dish or use as a topping for burgers or meats.

Nutrition Facts

Serving size	(693.8g)

Amount per serving	% Daily Value*
Calories	959.8

Total Fat 79.9g	0%
Saturated Fat 21.5g	0%
Polyunsaturated Fat 6.0g
Cholesterol 65.8mg	0%
Sodium 763.1mg	0%
Total Carbohydrate 57.9g	0%
Dietary Fiber 11.2g	0%
Total Sugars 27.4g
Protein 7.3g	0%

Vitamin D 4.5IU	0%
Calcium 162.5mg	0%
Iron 2.0mg	0%
Potassium 976.0mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 73.4%

Protein: 3.0%

Carbs: 23.6%