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How to Make Onion Confit

How to Make Onion Confit

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  • Author: Alexandra Shytsman
  • Total Time: 40 minutes
  • Yield: About 1 1/2 cups 1x


Onion confit is both one of the easiest and most sophisticated condiments you will ever make.


  • 2 medium yellow onions, thinly sliced (about 3 cups)
  • 1 tbsp butter
  • 1 tbsp olive oil
  • 1/2 tsp sea salt
  • 1 tbsp granulated sugar
  • 3 tbsp apple cider vinegar
  • 1/2 tsp caraway seeds (optional)


Prepare Your Ingredients:

  • Start by gathering all your ingredients. Having everything within arm’s reach makes the process smooth and enjoyable.
  • Thinly slice your 2 medium yellow onions. Aim for uniform slices to ensure even cooking.

Begin the Caramelization Process:

  • Set Up the Skillet: In a large skillet, combine 1 tbsp of butter and 1 tbsp of olive oil. This combo not only imparts rich flavor but also ensures that the onions don’t burn.
  • Heat and Add Onions: Switch on the stove and set it to a low flame. Once the butter melts and the mixture is warm, introduce your thinly sliced onions.
  • Season: Sprinkle in 1/2 tsp of sea salt. This helps in drawing out moisture from the onions, intensifying the flavors as they cook.
  • Stir and Monitor: Let the onions cook, giving them an occasional stir. They should become soft and translucent over a span of 15-20 minutes. A good sign to watch for is the onions turning a soft golden hue. If you notice the onions drying out at any point, add a tablespoon of water. This ensures they remain moist and prevents burning.

Add Sweetness and Tang:

  • Sweeten the Mix: Sprinkle in 1 tbsp of granulated sugar. This will help with the caramelization and provide a sweet counterpoint to the tanginess that’s about to come.
  • Introduce Vinegar and Caraway Seeds: Pour in 3 tbsp of apple cider vinegar. If you’re opting to use the caraway seeds (and I’d recommend it for an added depth of flavor), toss in your 1/2 tsp now.

Final Touches and Storage:

    • Final Caramelization: Continue to simmer the onions over the low heat, stirring every now and then. Watch as they turn into a beautifully caramelized, pasty consistency in about 15 minutes.
    • Cool and Store: Allow the onion confit to cool down a bit before transferring it to an airtight container. It can comfortably reside in your fridge for up to a week, ready to elevate any dish you add it to.
  • Prep Time: 10 mins
  • Cook Time: 30 mins
  • Category: Condiment
  • Method: Confit
  • Cuisine: French
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