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5.0 from 30 votes

Balsamic Onions Recipe

These delicious slow-roasted balsamic onions are caramelized to perfection and burst with flavor for the perfect accompaniment to any dish.

Prep Time
5 mins
Cook Time
5 mins
Servings: 8
Calories: 162 kcal
Course: Side Dish
Cuisine: Italian , American

Ingredients

  • 2 large peeled red onions cut into thin wedges
  • ½ cup balsamic vinegar
  • ½ cup olive oil
  • 3 tablespoons of sugar

Instructions

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  1. Slice the onions into thinly sliced wedges, or you can slice the onions into rings that are about ¼” to ½” thick.
  2. Evenly spread out the onions on a sheet tray lined with parchment paper and place them on the middle rack in the oven at 375° for 30 minutes.
  3. While they are roasting, whisk together the balsamic vinegar, olive oil, and sugar in a medium-sized bowl.
  4. Baste the onions using a brush every 5 minutes until they are a dark caramelized color.
  5. Remove the onions once they are done cooking and serve them or store them.

Notes

  • Make-Ahead: You can make these balsamic onions 2 days ahead of time.
  • How to Store: Cover and keep them in the refrigerator for 5 to 6 days. You can freeze these covered for up to 3 months. Thaw them in the refrigerator for 1 day or until thawed.
  • How to Reheat: Add the onions to a sheet tray lined with parchment paper and cover it with foil. Bake in the oven at 350° for 5 to 7 minutes or until warm.
  • You can also use white, sweet, or yellow onions if all are available.
  • For even more caramelized onion flavors, feel free to cook these for another 10 to 15 minutes.

Nutrition Information

Calories 162kcal (8%) Carbohydrates 10g (3%) Protein 0.4g (1%) Fat 14g (22%) Saturated Fat 2g (10%) Polyunsaturated Fat 1g Monounsaturated Fat 10g Sodium 5mg (0%) Potassium 58mg (2%) Fiber 0.5g (2%) Sugar 8g (16%) Vitamin A 1IU (0%) Vitamin C 2mg (2%) Calcium 11mg (1%) Iron 0.3mg (2%)

Nutrition Facts

Serving: 8Serving

Amount Per Serving

Calories 162

% Daily Value*

Calories 162kcal 8%
Carbohydrates 10g 3%
Protein 0.4g 1%
Fat 14g 22%
Saturated Fat 2g 10%
Polyunsaturated Fat 1g 6%
Monounsaturated Fat 10g 50%
Sodium 5mg 0%
Potassium 58mg 1%
Fiber 0.5g 2%
Sugar 8g 16%
Vitamin A 1IU 0%
Vitamin C 2mg 2%
Calcium 11mg 1%
Iron 0.3mg 2%

* Percent Daily Values are based on a 2,000 calorie diet.