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How to caramelise onions?

Whether it’s a supplement or an element that adds flavor, onions matter. One way to use them is to caramelize them. In this article, we read about How to caramelise onions?

Creativity in the way you cook is essential to making the best burger in the world. The art of caramelizing onions is a way to stimulate your creativity and play with it. But it’s important to start with the basics, so together let’s cover the basics, the different ingredients to use, and pro tips on how to caramelize onions the right way.

Which onions should you use to caramelise onions?

You can caramelize any type of onion, from regular yellow onions to shallots and Vidalia onions. The yellow ones are probably the easiest and most versatile ones, but red onions add great color and the smaller shallots have a nice sweetness so they end up being sugary.

What do caramelized onions bring to gourmet burgers?

Not an easy addition to burgers, caramelized onions add a touch of sweetness to your recipe. If you play on the sweet and salty taste of your gourmet burger with caramelized onions or other sweet ingredients (pears, apples, jam, etc.), this burger will really become your own.

15 deluxe ways to caramelize onions

Good to know: onions contain sugar and of course caramelize if you cook them slowly. If you want to add a little extra flavor to your burgers, there are several interesting ingredients to add to them.

Onions can be cooked with a variety of ingredients (caramelization options):

  • honey
  • Balsamic vinegar
  • Wheat beer
  • red wine
  • port wine
  • White wine
  • sugar
  • powdered sugar
  • Brown sugar
  • Coconut blossom sugar
  • Maple syrup
  • cola
  • vinegar
  • Agave syrup
  • nature

How can you cook braised onions properly?

Whether you choose to caramelize red onions with maple syrup or shallots with Coca-Cola, the cooking options are endless! Here we take a look at some of them, but as always with cooking, only your creativity is the limit.

How should the onions be cut?

The way you cut your onions will determine the position they will occupy in your burgers, the consistency of your “onion compotée” and the added flavor they should bring.

  1. For use in a Compotée, with a jam consistency :
    ⇒ chopped or diced
  2. As an individual item with a unique taste:
    ⇒ sliced

How you do this depends a lot on what your expected result is. Should it only support other tastes or bring its own value to the hamburger?

Preparation options to caramelise onions

You are not a professional cook, but the right consistency is important to you, don’t worry! You don’t need extravagant equipment to prepare your own caramelized onions.

Option # 1 – Sear in the oven

  1. Bring the baking sheet to the lowest position and heat it to 200 degrees Celsius.
  2. Cut the onions in the desired way, dice with oil.
    Toast until tender and cut surfaces are golden brown, 25 to 30 minutes.
  3. Add your caramelizing product to the onions and continue frying until the mixture is the right consistency.

Option # 2 – Glaze in a pan to caramelise onions

  1. Just start adding the oil in a pan over low medium heat. You can choose between olive oil, rapeseed oil, or any other vegetable oil. Using sesame oil or soy sauce will also produce delicious results.
  2. As soon as the pan is warm enough, i.e. when the oil is also warm, carefully add the onions and cook them until they are lightly brown, but not too much!
  3. Add the desired amount of your caramelization option to the pan and cook the entire mixture, stirring constantly. It shouldn’t stick in the pan, but ultimately have the desired consistency.

Option # 3 – grill to caramelise onions

  1. Heat your outdoor grill to medium to high temperatures.
  2. Place a heavy pan on the grillage and let it get hot.
  3. Add 4 tablespoons of unsalted butter and 1 tablespoon of olive oil to the pan.
  4. While the butter is melting, slice the onions.
  5. Place the onion slices in the melted butter and stir so that they’re all coated with butter and oil.
  6. Cook the onions until they soften and wilt.
  7. Turn the heat on your outdoor grill down to medium to low and continue cooking for about 10 minutes. Stir the onions occasionally.
  8. Sprinkle the caramelization option over the onions, stir, and continue cooking for 10 to 15 minutes. The onions are caramelized when they are deep, golden brown in color.


Caramelized onions can be refrigerated for three to four days or frozen for up to three months.

Also read: how to bleed brakes.



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