How to Caramelize Onions the Right Way

Slice Off the Tops and Bottoms

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Start with at least three onions of the same type (any less seems not worth the effort, and these reheat well), whether it be yellow, white, or red. Cut off the tops and bottoms of the onions.

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Slice the Onions

Image Source: POPSUGAR Photography / Nicole Perry

Cut each onion in half, and then slice into thin, half-moon slices. While it's not crucial that these are all exactly the same width, try to keep them somewhat even so that they will caramelize at the same rate.

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Start Cooking

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Heat a teaspoon of neutral oil for each onion over medium-high heat in the bottom of a large skillet or dutch oven (use whatever cooking vessel has the largest surface area on the bottom). When the oil is just-shimmering, transfer the sliced onion to the skillet (we like to use a bench scraper to make this easier). Once you add the onions, toss them to coat with the oil and gently break up the onion slices.

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Add a Pinch of Salt and Sugar

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Keep cooking, stirring the onions occasionally and adjusting the heat (if necessary) to accomodate slow, even browning. After about 10 minutes, when the onions have started to sweat and have softened considerably, add a heaping 1/4 teaspoon kosher salt and 1/4 teaspoon granulated sugar per onion.

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Scrape Up the Brown Bits

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Scrape up any brown bits that begin to form on the bottom of the skillet; a flat-sided wooden spatula is particularly well-suited to this task. Add a splash of water (about a tablespoon) from time to time to aid in deglazing the browned bits.

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Continue Cooking

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Continue cooking, stirring occasionally, until the onions have shrunk considerably (they'll be about a quarter to a third of their original volume), have slumped into soft tendrils, and are a deep caramel-brown color. Take the pan off the heat, and season to taste with salt and a splash of balsamic vinegar, if you like.

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Caramelized Onions

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Fully caramelized onions should be soft and deep-golden brown. Either use the onions immediately or keep them on hand to add deep flavor to dishes at a later date (they should keep in the refrigerator for at least a week). We utilize these robustly savory-sweet onions in quick french onion soup; to add interest to burgers, hot dogs, and sandwiches; or on top of pasta and pizza, but their uses are nearly endless.

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Image Source: POPSUGAR Photography / Nicole Perry

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