
Sautéing onions is a simple and essential kitchen skill that can be used to add a layer of flavour to a variety of dishes. The process transforms the onions from sharp to sweet and tender, making them a perfect side dish or topping for sandwiches, burgers, steaks, and more. Sautéing onions involves heating oil or butter in a pan, adding chopped or sliced onions, and stirring frequently over medium heat until they are golden brown and slightly tender. This article will provide a step-by-step guide on how to sauté onions, offering tips and tricks for achieving the perfect result.
| Characteristics | Values |
|---|---|
| Pan Type | Non-stick skillet or cast-iron skillet |
| Pan Size | 12-inch |
| Onion Type | Yellow onions or white onions |
| Onion Cut | French cut or thin slices |
| Oil Type | Olive oil, avocado oil, vegetable oil, or butter |
| Oil Quantity | 1-2 tablespoons per onion |
| Salt Type | Diamond Crystal kosher salt or regular salt |
| Salt Quantity | 1/2-1 teaspoon |
| Heat | Medium or medium-high |
| Cooking Time | 5-10 minutes |
| Stirring | Frequent |
| Covering | Uncovered |
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What You'll Learn

Choosing the right pan
Pan Type
While a heavy cast iron skillet is ideal for cooking onions due to its even heat distribution, any large sauté pan or skillet will work. If you want to sauté onions without oil or butter, a non-stick pan is recommended. A 12-inch non-stick skillet is a popular choice, but other skillets like stainless steel or well-seasoned cast iron can also be used.
Size
Select a pan that is large enough to hold the desired quantity of onions. The onions should fit snugly in the pan, allowing enough space for easy stirring. A large pan is generally preferred as it prevents overcrowding, ensuring even cooking.
Heat Distribution
Even heat distribution is essential for sautéing onions. Choose a pan that heats evenly and consistently to avoid hot spots that can burn the onions. Cast iron skillets are known for their excellent heat retention and distribution.
Lid
It is recommended to leave the lid off the pan when sautéing onions. Covering the pan can add moisture, preventing the desired crisp browning of the onions. Keeping the pan uncovered allows the liquids to evaporate, facilitating the browning process.
Stirring Accessibility
Choose a pan that provides easy access for stirring. Since frequent stirring is necessary to prevent burning and ensure even cooking, you want a pan that allows you to easily mix and move the onions around.
Heat Source
Consider the heat source you will be using. Different pans may work better with certain stovetops or heat sources. For example, cast iron skillets are versatile and can be used on various heat sources, including gas, electric, and induction cooktops.
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Preparing the onions
Firstly, choose the right type of onion. Yellow onions are the most commonly used for sautéing, but white onions can also be used. If you want a sweeter taste, opt for sweet onions, which have a higher sugar content.
Next, cut the onions. The French cut is a popular method, resulting in delicate slivers. To do this, slice off the ends of the onion, cut it in half, and remove the outer layer. Place the onion flat side down and cut parallel to the root, following the curve.
Once the onions are cut, separate the layers. This will help them cook evenly. You can cut the onions into thin slices or dice them, depending on your preference.
Before you start cooking, gather your equipment and ingredients. You will need a skillet or pan, preferably a large non-stick pan, and a wooden spoon or heatproof spatula for stirring. For the ingredients, you will need onions, oil or fat (such as olive oil, avocado oil, butter, or vegetable broth), and salt to taste.
Now you are ready to begin the sautéing process. Heat your oil or fat of choice in the pan over medium heat. You will know it is ready when it starts to shimmer and sizzle. Adding a pinch of salt at this stage can help draw out moisture.
Finally, add the onions to the pan and sprinkle with salt, if desired. Stir the onions frequently to ensure even cooking and prevent burning. The onions will take around 5 to 10 minutes to cook, depending on your desired level of doneness. They are ready when they are soft, golden brown, and slightly tender.
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Heating the pan
First, choose your pan. A non-stick skillet is recommended by several sources, with cast iron skillets also suggested. The size of the pan should be large and wide, allowing moisture to evaporate as the onions cook. A 12-inch pan is often recommended, but a 10-inch skillet will also work.
Next, turn on the heat. The temperature you choose will depend on your stove and cookware, but generally, a medium to medium-high heat is recommended. One source suggests a low-medium flame, while another suggests a medium-low heat to start with. It is important not to go too high, as this will result in unevenly cooked onions and may cause burning.
Now, add your oil. Olive oil is a popular choice, but you can also use avocado oil, vegetable oil, or butter. Heat the oil until it shimmers and sizzles, or is hot. This should only take a couple of minutes.
Once your oil is hot, you are ready to add your onions.
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Cooking the onions
First, prepare your onions. For sautéing, it is recommended to cut the onions into long slivers, which can be achieved by cutting the onion in half, removing the paper and outer layer, placing the onion flat side down, and cutting parallel to the root. This is called a "French cut". However, you can cut the onions in any way you like.
Next, heat oil or butter in a large skillet or pan over medium to medium-high heat. Use about 1 tablespoon of fat per small to medium onion, though you can use just about any type of fat. If you want to sauté onions without oil, use a nonstick pan and add a small amount of water or vegetable broth to prevent sticking.
Once the oil is shimmering or sizzling, add the onions and sprinkle with salt. Use a wooden spoon to spread them evenly in the skillet. For even cooking, do not overcrowd the pan with onions.
Stir the onions frequently to prevent burning and sticking. Depending on your desired level of doneness, cook the onions for 5 to 10 minutes, or until tender, slightly browned, and starting to sweeten. If you prefer your onions crispier and more burnt, cook them for a few minutes longer.
As soon as the onions reach your desired level of doneness, add a liquid or other ingredients to the pan to stop the cooking process and prevent burning.
Sautéed onions are now ready to be served or added to other dishes. They make a great topping for burgers, sandwiches, steaks, and hot dogs, and can be used as a side dish or in dips and omelets.
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Storing leftovers
If you wish to store your leftover onions for longer, you can freeze them. Place the cooled onions in an airtight container or freezer bag, removing as much air as possible. Frozen cooked onions can be stored for up to 12 months.
It is not recommended to store leftover onions at room temperature. This is because onions are best stored in a cool, dry, and well-ventilated place, away from direct sunlight. Room temperature storage is only recommended for whole, raw onions, which can last two to four weeks at such temperatures.
If you are storing raw onions in the refrigerator, they should be kept in an airtight container or resealable plastic bag. They will last seven to 14 days when stored this way.
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Frequently asked questions
Medium to medium-high heat is best for sautéing onions. Avoid the temptation to cook them over high heat as this will result in unevenly cooked onions.
No, do not cover the pan. Covering the pan will steam the onions and prevent them from browning.
Yellow onions are the go-to for sautéing, but white onions work too. Sweet onions are great if you're looking for a sweeter taste.











































