Caramelized Onions

Updated June 24, 2024

Caramelized Onions
Christopher Testani for The New York Times. Food Stylist: Simon Andrews.
Total Time
40 minutes
Prep Time
10 minutes
Cook Time
30 minutes
Rating
4(130)
Notes
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Soft, caramelized onions can add sweetness and richness to any dish that calls for sautéed onions, but they are especially good in soups, curries, sandwiches, pastas and dips — which is to say, everywhere. (Keep a container on hand, refrigerated for 1 week or frozen for a couple months.) Typically a time-intensive process, this recipe speeds things up by starting the onions covered to help release their liquid and repeatedly pouring in water and scraping the bottom of the pan to incorporate the delicious browned bits. Be sure to stand by and stir the onions often to prevent burning, although you’ll want to anyway to soak up their smell.

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Ingredients

Yield:1 packed cup
  • 2pounds yellow or red onions
  • 2tablespoons unsalted butter
  • Salt
  • Water or chicken stock, as needed
  • 1tablespoon white wine or vinegar (optional, for tangy flavor)
Ingredient Substitution Guide

Preparation

  1. Step 1

    Trim the tips of the onions, then halve them through the root and peel them. Thinly slice the halved onions from tip to tip.

  2. Step 2

    Melt the butter in a large (12-inch) skillet over medium-high. Once foaming, add the onions, season with salt and stir to combine. Cover and let steam, stirring once or twice, until softened and just beginning to brown, 3 to 6 minutes.

  3. Step 3

    Reduce heat to medium and remove the cover. Stir frequently until the onions are deep brown, 15 to 20 minutes. Every time you see browned bits on the skillet, add a couple tablespoons of water and scrape up the bits. Add the wine, if using, and stir until evaporated, then season to taste with salt.

Ratings

4 out of 5
130 user ratings
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Cooking Notes

15 to 20 minutes is much quicker than I have ever achieved. More like 30 to 40 minutes at very low heat.

For caramelized onions that don't need to watched over, use a slow cooker. Takes longer, but you are free to wander away.

Slicing the onion "through the root" Would that be pole-to-pole, or across the equator??? both go "through the root" if root means the smallest segment at the center of the onion.

My recipe is better. It's more like onion confit, though: 1: heat olive oil in pan over medium heat. 2: add a lot of sliced onions with salt. 3: cook until soft, stirring now and then. 4: turn off heat. let sit. 5: at some point, when it occurs to you, turn on the heat again and get the onions sizzling a bit. turn off the heat. 6: repeat over the course of the day, whenever you in the kitchen. eventually you have onions so sweet, and a little chewy, that even children eat them out of the pan.

I LOVE caramelized onions and am thrilled to learn that they can be frozen, but I steamed mine for too long, the full six minutes, so I didn't really save any time and certainly didn't need to add any water, so I would definitely recommend steaming them for only 3 minutes and will so next time. I added sherry vinegar a la Deborah Madison, which takes these over the top, and she has several uses for them in her In My Kitchen cookbook. Wonderful, easy, and inexpensive weekend project.

The bulb of the onion is actually leaf tissue, not root tissue (as per commenter, previous). Cutting through the root then does mean from the top, down through the obvious root end. If this were a carrot, your confusion would be warranted.

She uses the same method with only one pound of onions in the recipe in her cookbook, French Onion White Bean Bake, which is excellent, and they cook faster with only one pound of onions.

A small jar of these in the fridge is like money in the bank. Add endlessly to eggs, stir fry, meat, anything, with no effort.

I love french onion soup, but hate caramelizing onions. Takes so much time and they get so mushy :-( To avoid this, I used dehydrate onion slices from my garden and saute them in olive oil until nicely brown (3 minutes or so) They brown fast so be vigilant! When they are done I pour broth over them and simmer for 10 minutes to re-hydrate. Top with a big crouton, cheese and run under the broiler.

This recipe is turning out to be a treasure to stash away in the freezer for when the winter comes, and when it's too cold, and I don'r want to go out--so economical, yet yields such rich dividends. I love Ali Slagle's recipes, have her cookbook, and look forward to every new recipe she publishes on the New York Times. I have multiple sclerosis but still love and prefer to cook for myself, and her recipes are unfussy and easy to make.

So simple and yet yields so many large dividends! I am looking forward to using these in Deborah Madison's recipe for butternut squash and caramelized onion soup next weekend when the last of the October warmth ends and cold-weather soup season begins.

What's the difference between using unsalted butter and then seasoning the onions with salt versus just using salted butter?

Slicing the onion "through the root" Would that be pole-to-pole, or across the equator??? both go "through the root" if root means the smallest segment at the center of the onion.

It should mean pole to pole, cutting the root end in half. The root is not the smallest segment at the center, but the spot where the actual root comes out of the onion, the fibrous end of a stored onion.

Deeper flavor, longer onion.

You can microwave peeled and slice onions for a minute or so per onion in advance to drive off some of the water, which slows the caramelization process. Saves some of the time spent stirring over heat.

Good! I've considered a small jar of caramelized onions in the fridge to be a staple. It adds an excellent touch to many dishes. I had only 1.5 lb of onions, but this recipe is completely flexible. I liked using a large, wide skillet instead of the soup pot I'd previously used for this. The pan's nonstick lining made it unnecessary to add water. I did add the tablespoon of white wine. Some of the result went into a quiche with artichokes and grated Cheddar, Fontina, and Manchego. Delish.

A whisky or brandy works well in place of the wine. I cook the onions down to a much richer color, smother a Brie or Camembert a covered Brie baker and bake the whole thing until the cheese is just the right texture, about 10 minutes on 350. My baker fits in my toaster oven, making it even easier. Smells, looks, and tastes like it much more work than it is.

I do 3-5 onions in 2 large cast iron pans in a bit of olive oil on the gas bbq at about 400 degrees for about 40 minutes, stirring occasionally until they are dark brown to black. They go into a family recipe, viande noire, with about 3 pounds of large well browned chunks of beef brisket or blade, lots of sliced garlic, some salt and water 2/3rds up,bring to a boil, then low simmer 3-4 hours. Some onions in broth are frozen for onion soup base, the rest for stews. Simple and delicious!

If you slice onions next to your sink, with the water running (spray mode works even better), you will dramatically reduce your tears.

I make these weekly, I saute in chicken fat, beef fat or bacon grease...I add dry vermouth or brandy, sometimes red pepper flakes. Love it when I get bits of almost burnt onion in it for an extra layer of flavor. Mine takes at least 45 minutes to come to a beautiful caramel tone .....and if it's too watery, I leave the cover off for a few minutes. It's delicious stirred into pureed cauliflower or a quick pork hash or to elevate a burger or a grilled cheese sandwich.

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