Melted Onions Recipe on Food52 (2024)

FAQs

How do you melt onions? ›

Heat your oven to 425°F with a rack in the top position. Place the onion halves cut-side up in the cups of a 12-cup muffin tin. Sprinkle the onions with the salt and pepper. Roast for 20 minutes, until the onions have softened slightly and sunk into the cups.

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.

Vinegar. This is our secret ingredient to make the best caramelized onions. Vinegar adds a touch of acidity to balance out the sweetness of the onions. It elevates their flavor wonderfully.

Baking soda makes the onions more alkaline, which speeds up the browning reactions necessary for properly caramelized onions. But it also weakens the pectin that holds the onion's cells together, turning what should be soft but distinct pieces of browned onion into a nauseating stew of pea-green mush.

Onions - soaking in cold water to soften the flavor

When preparing raw onions, soak in cold water before hand to remove some of the pungency and soften the flavor. However since soaking too long will dilute the flavor, soaking in cold water for 5 to 10 minutes is recommended. Squeeze out excess water before using.

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.

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.

You'll see some people add sugar to the recipe, which is done to speed it up. Doing this is caramelising the sugar, not the onion. The onions get plenty sweet enough on their own if you take your time with it. From a health perspective it's much better not to add extra sugar.

You can use just oil, or a combination of butter and oil—the choice is yours! If you pack too many onions into your pan, they'll steam and produce water. Eventually, they will caramelize—but it will take much longer to get them there.

Cover the pot with a lid, and then turn the burner on to medium-low heat. Cook covered until the onions have mostly broken down and are a pale brown sludge (about 45-60 minutes). Be sure to stir the pot periodically, checking to make sure the onions aren't burning.

How to melt onions in gravy? ›

Slice the onions to about ½ inch thick, try to make them the same size so they cook evenly. Melt 4 TBS butter in a pot over medium heat and add the sliced onions. Cover partially and let them simmer, soften, and reduce for about 25 minutes. Stir every few minutes and reduce heat if they start cooking too quickly.

When you cook onions they go through some obvious physical changes. First, they get hot and release moisture, at which point they become slightly translucent. Keep cooking them and they begin to brown and sweeten because their sugars caramelize. In time they darken and the sweetness intensifies.

Boiling onions is as simple as peeling them, adding them to a pan with boiling water with a bit of salt and leave them for around 10 minutes. Drain them, and they are ready to go! Boiling onions will get rid of their bitterness while still retaining a subtle onion flavour.