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white bowl heaped high with Balsamic Caramelized Onion
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5 from 3 votes

Balsamic Caramelized Onions

If you have ever wondered what the best way to caramelize onions is then you have come to the right place. Take your time and be patient and within 15 minutes you are going to have the best balsamic caramelized onions that can bring a dish from average to all kinds of amazing.
Prep Time10 mins
Cook Time40 mins
Course: Basic
Cuisine: Anytime
Keyword: balsamic caramelized onions
Servings: 6 serves
Calories: 131kcal


  • Heavy based saucepan


  • 4 large brown onions
  • 4 tbsp olive oil (enough to coat the bottom of the pan)
  • 2 tbsp balsamic glaze
  • pinch of salt


  • Remove the skin from the onions, cut in half and place the onions cut side down on a chopping board. Slice each onion as thinly as you can.
  • Add enough oil to coat the bottom of a heavy-based saucepan (how much oil is needed is going to depend on the size of your pan). Heat over med-low heat until shimmering.
  • Once shimmering add the sliced onions and a pinch of salt to the saucepan and mix to ensure they are covered with the oil. Spread the onions over the base of the pan.
  • Leave the onions to cook for about 20 minutes, stirring occasionally. Make sure to scrape up any bits sticking to the pan and incorporate them back into the mixture.
  • At this point, you want to add in the balsamic glaze. Drizzle it over the onions and then stir to incorporate, making sure to scrape up any bits again. Cook for another 15-20 minutes, stirring occasionally.
  • Once the onions have become soft and a deep golden brown in color then they are ready. Remove from the heat and store in a glass jar with a lid in the fridge until ready to use.


My onions are sticking: try adding a little bit of water or a little more oil and giving everything a good scrape no make sure nothing gets too burnt sticking to the pan. You may also want to reduce the heat, all stovetops are different so yours may run a little hotter than others.
It's been 40 minutes and my onions aren't brown enough yet: just keep cooking. Maybe try turning the temperature up a little
My mum adds sugar: I know traditionally a lot of people do add sugar to their caramelized onions but I have never felt the need to. The natural sugars from the onions do the job just fine and the balsamic glaze adds a nice little boost of flavor whilst deglazing the pan.


Calories: 131kcal | Carbohydrates: 12g | Protein: 1g | Fat: 9g | Saturated Fat: 1g | Sodium: 4mg | Potassium: 146mg | Fiber: 2g | Sugar: 5g | Vitamin C: 7mg | Calcium: 23mg | Iron: 1mg