Melted Onions Recipe on Food52 (2024)

FAQs

How to caramelize onions without burning? ›

Kenji Lopez-Alt put together a “quicker” method that, he claimed, made caramelized onions in 15 minutes, or about a third of the time. The trick, according to Kenji, is that you use a higher heat, but regularly deglaze with water, so the onions don't burn.

Caramelized onions work beautifully when piled on patty melts, cheesesteaks, sausage heros, or even just a piece of crispy bread with goat cheese. They work well on cold cuts too. Ham, mayo, and caramelized onions on some country bread?

Heat the oil in a 12-inch cast iron skillet over medium heat. Add the onions and sauté for 5 minutes or until starting to soften. Add the salt, reduce the heat to medium low and cook for 50 to 80 minutes, stirring every few minutes, or until the onions are very soft, golden brown, and caramelized.

Stainless steel or cast iron skillets are ideal for caramelizing onions.

Once the water is boiling or close to it, put a lid on the pan so the onions can steam. This essentially massively speeds up the process of wilting the onions, which can be the first 15-20 minutes of the sautéing process.

Use Water. Like I mentioned above, we want to get rid of all the water in the onions to allow for browning to take place. But once the onions do start to brown, water can be your best friend! Adding water periodically into the pan while caramelizing your onions will prevent burning.

Our Test Kitchen likes to use butter when caramelizing onions, as it offers the richest flavor. If you avoid dairy or don't have butter, you can caramelize onions in other fat such as margarine or olive oil. Add the onion slices. It's okay if they overlap a bit here because they'll shrink as they cook down.

You can use either oil or butter to caramelize onions — but ideally, you use a combination of both! I like to use olive oil, and this cooking fat tolerates heat particularly well. Meanwhile, butter adds a distinctly rich flavor to the caramelized onions.

Sautéing vs caramelizing

Sautéing is about softening and lightly flavoring the onions, while caramelizing is about developing a rich, sweet complexity. Unfortunately, you can't swap one out for the other without changing the flavor profile of your dish.

Not cooking the onions long enough.

→ Follow this tip: Cook times will vary depending on the number of onions you're cooking and the type of onion (its sugar content and age), but plan to cook caramelized onions for 40 to 50 minutes (at least) until they have a dark-brown, rich color.

How long to caramelize diced onions? ›

Some recipes say it takes 45 minutes to 1 hour to caramelize diced onions, while others recommend 30 to 40 minutes for thin slices.

Tip: the vinegar serves to deglaze the pan, adds acidity, and brings this recipe together by boosting the tangy and savory flavors of the caramelized onions. If the onions stick to the pan, that's fine.

Caramelize the onions: Heat about 1 tablespoon of canola oil in a large skillet or dutch oven over medium-low heat. Once hot, add the onions and stir to coat. Let cook, stirring every 5-10 minutes, until deeply caramelized, about 1 ½ - 2 hours.

Fold onions with a spatula, scraping bottom of pan to ensure they don't stick or scorch. Cook, stirring every 5 to 6 minutes and reducing heat as necessary to maintain a gentle simmer, until liquid has evaporated, about 35 minutes.

It takes time, probably a solid 45 minutes, for the onions' sugars to caramelize. If your heat is too high, the onions will burn. Heat your pan over medium-low, then add your onions. Keep it on that temp for the whole process.

While you can start the cooking process at medium heat, low and slow is the name of the game when it comes to caramelizing onions. Once your onions begin to soften and take on a golden hue, you'll want to reduce the heat from medium to medium-low or even low for the remainder of the cooking process.