4large (about 1 pound)(500grams)onionswhite, yellow, or red
1tablespoonolive oilextra virgin
1tablespoonsugar
1teaspoonsalt
1½cups(240grams)water
1tablespoonvinegarbalsamic or apple cider
Peel 4 large (about 1 pound) onions and cut them into ⅕ inch or ½ cm slices.
Heat 1 tablespoon olive oil in a large skillet with a heavy bottom.Add the sliced onions, 1 tablespoon sugar, and 1 teaspoon saltSauté on medium-high heat for 5 minutes until they start to soften and become translucent.
Add 1½ cups water and simmer on medium-low heat for about 20 to 30 minutes. Stir occasionally.By the end, the onion should be soft and golden brown and absorb all water.
Turn the heat to high and add 1 tablespoon vinegar to the hot pan.Stir the onions for a couple of minutes to mix them with the vinegar.When the vinegar has been absorbed completely, turn the heat off, taste, and adjust for salt.
Nutrition information is an estimate for 1 small serving of caramelized onions out of 8 servings.SUBSTITUTIONSOnions: we used yellow onions. Substitute red onions, white onions, or shallots.Olive oil: You can use olive oil or extra virgin olive oil. You can substitute avocado oil or another vegetable oil for olive oil.Vinegar: We recommend balsamic vinegar because of its complex, sweet, and bold flavor. You can substitute apple cider vinegar or another type of vinegar for balsamic.Sugar: You can use white or brown sugar. You can also omit the sugar, but the onions will lack the oomph and take longer to caramelize.STORAGERefrigerator: Store in an airtight container. Lasts up to 1 week.Freezer: Cool completely before freezing. Store in a freezer-friendly container. Lasts up to 3 monthsFrozen in portions: Freeze in ice cube trays. Once frozen, transfer cubes to a freezer-safe bag. Allows for thawing small portions as needed.To use frozen onions, defrost in the refrigerator for several hours and serve at room temperature.