Ella Walter
Onions are a staple in kitchens around the world, and for good reason. They are versatile, packed with flavour, and add a unique depth to any recipe. Cooking onions in an air fryer is a quick and easy way to prepare them, and they can be used in a variety of dishes, from burgers to soups and salads. Air-fried onions are also a healthier alternative to traditional sautéing, as they use little to no oil, resulting in less fat and fewer calories. In this article, we will guide you through the simple steps to achieve perfectly cooked onions in your air fryer.
| Characteristics | Values |
|---|---|
| Onion type | Sweet, red, white, yellow, shallots |
| Onion size | Large, thinly sliced |
| Oil | Olive, avocado, ghee, or cooking spray |
| Seasoning | Salt, garlic powder, brown sugar, Italian seasoning, Cajun seasoning |
| Air fryer temperature | 265-375°F |
| Cooking time | 10-35 minutes |
| Stirring/shaking | Every 5 minutes |
| Storage | Airtight container in the refrigerator for up to 5 days, or freezer for 3-6 months |
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What You'll Learn
Choosing the right onion
Yellow onions, also known as sweet onions, have a high sugar content, which intensifies as they cook, making them ideal for air frying if you want sweet and caramelized onions. They have a sharp pungency and a strong flavor, so they are not typically consumed raw.
Red onions, on the other hand, have a sharper flavor and are more crisp and enjoyable when eaten raw, often used in salads. They add a little extra flavor to dishes and have a fairly strong pungent flavor. Red onions are also one of the sweetest varieties of onions, especially when roasted, grilled, or transformed into a jammy caramelized spread.
White onions are known for their flexibility and are used in various cuisines worldwide. They have a mild but complex flavor and can be eaten raw or cooked.
Other types of onions include shallots, which are a separate Allium species with a delicate flavor, and scallions or green onions, which are typically consumed raw.
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Selecting the right oil
Air-frying onions is a healthier alternative to traditional sautéing, as it requires little to no oil. Using less oil makes the dish lighter and healthier, as the oil absorbed by the onion during sautéing increases its calorie count.
When air-frying onions, you can use a variety of oils, such as olive oil, avocado oil, or cooking spray. Olive oil is a popular choice for air-frying onions, as it adds flavour and helps to achieve a golden brown colour. Avocado oil is another healthy option with a high smoke point, making it suitable for high-temperature cooking. If you want to use less oil, you can opt for a cooking spray, which will still help the onions caramelize and become tender.
It's important to note that the type of oil you choose may depend on your personal preferences, the desired flavour profile, and the availability of the oil. Additionally, the amount of oil used can be adjusted based on your desired level of crispiness and oiliness.
When using oil for air-frying, it's recommended to lightly spray the air fryer basket or coat the onions with oil to ensure even cooking. This will help create crispy and delicious onions without making them too oily.
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Preparing the onions
Once you have your onions sliced or diced, place them in a large bowl and add a tablespoon of oil of your choice. You can use olive oil, avocado oil, or even ghee. Add a teaspoon of seasoning if you like. Toss the onions with the oil and seasoning until they are well coated. You can use Italian seasoning, Cajun seasoning, or brown sugar to deepen the caramelised flavour.
Now you're ready to start cooking the onions in your air fryer! Lightly spray the air fryer basket with oil, then add the onions, spreading them evenly. If you prefer, you can add the onions to the basket first and then spray them with oil. Make sure not to overcrowd the basket. Set the air fryer temperature to between 320°F and 375°F. The cooking time will depend on your desired level of doneness, but it usually takes around 20-30 minutes for the onions to become golden brown and crispy.
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Cooking the onions
Once you have your desired onion pieces, place them in a large bowl and toss them with olive oil or another cooking oil of your choice. You can also add salt or seasoning to enhance the flavour. Be sure to coat the onions evenly. If you prefer a lighter version, you can skip the oil, but the onions may turn out drier.
Next, place the coated onions into the air fryer basket. Avoid overcrowding the basket, as this will affect even cooking. Depending on the size of your air fryer, you may fit one large onion or about 2 cups of thinly sliced onions. Set the air fryer temperature to somewhere between 320°F and 375°F, and cook for about 20 minutes.
During the cooking process, it's important to stir or shake the onions every few minutes to ensure even cooking. This can be done by shaking the air fryer basket or by tossing the onions with a spatula. If you want softer, more caramelized onions, you can extend the cooking time by a few minutes. For crispier onions, continue air frying in 5-minute increments until the desired texture is achieved.
Your onions are ready when they are golden brown and crispy. Once cooked, remove them from the air fryer and serve immediately, or store them for later use. Cooked onions can be stored in an airtight container in the refrigerator for up to 5 days or frozen for up to 3 months.
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Storing the onions
Storing onions correctly is key to preserving their quality and safety. Onions are best stored in a cool, dry, well-ventilated area, away from direct sunlight, moisture, and heat. The ideal temperature range for storing onions is between 45-55°F (or 30°F-50°F according to another source), and they should be kept away from other produce items that release moisture, such as potatoes.
Whole onions should be stored at room temperature in a well-ventilated container, such as a wire basket, perforated plastic sack, open paper bag, or mesh bag. Their papery exterior serves as a natural protection from outside elements, but any moisture that gets trapped around them will promote early spoilage.
Cut or sliced onions can be stored in an airtight container in the fridge for up to a week. They can also be frozen for several months, although they may become a little dry. To freeze, pat them dry with a paper towel, then seal them in a ziploc bag with as much air squeezed out as possible.
Onions can also be hung from a rack in a utility room or stored in old nylon stockings or pantyhose, although this may be a more unusual method.
Onions stored correctly will last for several weeks, and in the right conditions, can even keep for up to a year. However, if they are not stored properly, onions can become soft, mouldy, or start to sprout.
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Frequently asked questions
First, preheat your air fryer to 350-375°F (190°C). Peel and slice the onions into short strips or dice them into ½ inch pieces. Toss the onions with a tablespoon of olive oil or avocado oil and a bit of seasoning until well coated. Place the onions into the air fryer basket and cook for 10-25 minutes, shaking the basket every 5 minutes to prevent burning.
It takes 10-25 minutes to cook onions in an air fryer. The cooking time depends on the thickness of the onion slices and your desired level of crispiness. For thinly sliced onions, a cooking time of around 12 to 15 minutes is a good starting point. If you want softer, more caramelized onions, you can extend the cooking time by a few minutes.
You can use any type of onion in an air fryer, such as yellow, red, or white onions. Yellow onions are great for sweetness, red onions add a little extra flavor, and white onions bring a bit more bite.
Let the air-fried onions cool completely, then store them in an airtight container in the refrigerator for up to 5 days or up to 1 month. You can also store them in the freezer for up to 3-6 months.
