Caramelized Onions for the Grill or Oven

Elevate your dishes with these rich, golden caramelized onions, a versatile recipe designed for both grill and oven enthusiasts. This foolproof method transforms everyday yellow onions into tender, sweet, and savory perfection, thanks to the magic of olive oil, butter, and a hint of brown sugar. Whether you’re cooking them in a cast-iron skillet on the grill or baking them to perfection in the oven, these onions are guaranteed to bring a depth of flavor to burgers, steaks, sandwiches, or roasted vegetables. For an extra layer of sophistication, add a drizzle of balsamic vinegar during the final minutes of cooking. With minimal prep and a hands-off cooking process, these caramelized onions are as convenient as they are delicious—perfect for summer BBQs or cozy dinners alike. Store leftovers in the fridge to enjoy throughout the week!

Nutriscore Rating: 72/100

Prep Time:10 mins

Cook Time:50 mins

Total Time:60 mins

Servings: 6

Ingredients

• 4 large Yellow onions
• 3 tablespoons Olive oil
• 2 tablespoons Butter
• 1 teaspoon Brown sugar
• 0.5 teaspoon Salt
• 1 teaspoon Balsamic vinegar (optional)

Directions

Step 1

Peel the onions and slice them into 1/4-inch thick rings or half-moons, depending on your preference.

Step 2

In a large bowl, toss the onion slices with olive oil, melted butter, brown sugar, and salt until evenly coated.

Step 3

To cook on the grill: Preheat the grill to medium-low heat. Place a large cast-iron skillet, grill pan, or heavy-duty aluminum foil packet on the grill grates. Spread the onions out evenly in the pan or foil packet. Close the grill lid and cook for 40–50 minutes, stirring occasionally, until the onions are golden brown and caramelized.

Step 4

To cook in the oven: Preheat the oven to 375°F (190°C). Spread the onions out on a baking sheet lined with parchment paper or inside a large oven-safe skillet. Bake for 40–50 minutes, stirring every 15 minutes, until the onions are golden brown and caramelized.

Step 5

If desired, drizzle balsamic vinegar over the onions during the final 5 minutes of cooking for extra depth of flavor.

Step 6

Remove the onions from the grill or oven and allow them to cool slightly. Serve immediately as a topping or side dish, or store in an airtight container in the refrigerator for up to 5 days.

Nutrition Facts

Serving size	(681g)

Amount per serving	% Daily Value*
Calories	841.8

Total Fat 65.6g	0%
Saturated Fat 19.5g	0%
Polyunsaturated Fat 4.7g
Cholesterol 65.8mg	0%
Sodium 1351.4mg	0%
Total Carbohydrate 60.5g	0%
Dietary Fiber 10.4g	0%
Total Sugars 29.5g
Protein 6.8g	0%

Vitamin D 4.5IU	0%
Calcium 135.6mg	0%
Iron 1.4mg	0%
Potassium 894.6mg	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: 68.7%

Protein: 3.2%

Carbs: 28.2%