Tiffany Haney
Cooking sliced onions in an air fryer is a quick, convenient, and healthy way to prepare this versatile ingredient. With a fraction of the oil used in traditional deep-frying, air-fried onions are a tasty, low-calorie option that can be added to a variety of dishes. Whether you prefer them soft and caramelized or golden brown and crispy, this method allows you to customize your onions to your desired level of doneness.
| Characteristics | Values |
|---|---|
| Temperature | 265F (130 C) to 375 F |
| Time | 10-25 minutes |
| Onion type | Red, white, yellow, sweet, shallots |
| Onion size | Large |
| Onion shape | Thin slices, strips, or rings |
| Oil | Olive oil, avocado oil, ghee, cooking spray |
| Seasoning | Salt, pepper, garlic powder, smoked paprika |
| Calories | 200-252 kcal |
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What You'll Learn
Air fryer settings
The ideal air fryer temperature for sliced onions is between 300°F and 375°F. A lower temperature will result in softer, more caramelized onions, whereas a higher temperature will yield crispier onions. For example, at 300°F, thinly sliced onions will cook in around 12 to 15 minutes. At 375°F, they will cook in 10 to 12 minutes.
It is important to note that the cooking time may vary depending on the quantity of onions and the desired level of doneness. For a larger batch, you may need to increase the cooking time by a few minutes. It is also crucial to stir or shake the onions every 5 minutes to ensure even cooking and prevent burning.
When preparing onions for air frying, it is recommended to slice them evenly to ensure uniform cooking. The ideal thickness of the slices depends on the desired outcome. For caramelized onions, a medium thickness is best, as slices that are too thin may burn, while thicker slices may not caramelize properly.
Additionally, it is recommended to toss the sliced onions with a small amount of oil, such as olive oil or avocado oil, before placing them in the air fryer. This helps the onions caramelize and become tender. However, it is possible to air fry onions without oil for a lighter, drier version.
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Onion varieties
Onions are indispensable to cooking, adding a unique sweet, savory, pungent, and aromatic touch to dishes. The humble onion is versatile, and can be roasted, grilled, pickled, caramelized, battered, deep-fried, sliced thinly, chopped, or served raw.
There are many types of onions to use as culinary accents. When used raw, they add a punch to salads, salsas, sandwiches, dips, or tacos. However, the real magic happens when they are cooked. A light sauté or slow roast enhances their natural sweetness and mellows their pungent flavors.
- Yellow Onions: The most common type of onion in the United States, these onions are round with a thin brownish papery skin. They are easily the most versatile cooking onion, with a balanced flavor that is not too sweet or sharp. They work well in a variety of cuisines, including Indian stir-fries, Italian red sauces, and Spanish paellas.
- White Onions: These onions have a papery white skin, and their flavor is milder and sweeter than yellow onions. They are good for serving raw in fresh salsa or homemade guacamole.
- Red Onions: Both the exterior skin and the flesh of red onions are a deep magenta color. They are pungent and can be served raw in salads, sandwiches, or burgers, adding a splash of color to the dish.
- Sweet Onions: These onions have a lower concentration of sulfur, allowing their sugar content to stand out. They are a good choice for people who want to like onions but dislike the strong taste of other varieties. Sweet onion varieties include Walla Walla, Maui, Vidalia, and others with "sweet" in the name. They are great for caramelizing and work well in stews or sautés.
- Scallions: Also known as green onions, scallions consist of long hollow round green leaves shooting up from a small bulb, which may be white or purple. They have a savory-fresh bite that makes them popular in East Asian cooking, such as the classic Korean pancake pajeon. Scallions are usually treated like fresh herbs and can be stored in the refrigerator, wrapped in a damp paper towel, and placed in a sealable bag.
- Shallots: Small, brown-skinned onions with purplish flesh, shallots have bulbs that resemble garlic, with multiple lobes. They have a sweet but mild flavor with a pungent, garlicky kick. They are not as commonly used in the United States but can add a unique touch to recipes.
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Slicing onions
Once the onions are sliced, they can be placed in a bowl and tossed with olive oil, avocado oil, or another cooking oil of choice. A small amount of oil is needed to help the onions caramelize and become tender. Seasonings such as salt, pepper, garlic powder, or smoked paprika can also be added for extra flavor. The onions should be tossed until they are well-coated with the oil and seasonings.
After the onions are prepared, they can be placed in the air fryer basket. It's important to not overcrowd the basket and to spread the onions out as much as possible. The air fryer should be preheated to a temperature between 300F and 375F, depending on the desired level of doneness. For crispy onions, a higher temperature is preferred.
During the cooking process, it's important to stir or shake the onions every 5 minutes to ensure even heating, texture, and color. The total cooking time will vary depending on the thickness of the slices and the desired level of doneness, but it typically ranges from 10 to 25 minutes. For softer, more caramelized onions, the cooking time can be extended, while it can be reduced for crispier onions.
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Oil and seasoning
A small amount of oil is needed to help the onions caramelize and become tender. You can skip the oil if you want a lighter version, but the onions may turn out drier. Olive oil, avocado oil, or cooking spray can be used. Coat the onion rings with some oil and place them in the air fryer basket. You can also spray the basket of the fryer with oil and add the sliced onions, giving them a spray of oil and tossing to combine.
For seasoning, you can add salt and pepper at a minimum. You can also add garlic powder or smoked paprika for extra flavor.
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Storage and reheating
Storing your air-fried onions is easy. Once they have cooled down, place them in an airtight container and store them in the refrigerator. They will last for up to 5 days when stored this way. You can also freeze them in an airtight container or freezer bag for up to 3 months.
To reheat your onions, you can use either the stove or the air fryer. If using the air fryer, allow the frozen onions to thaw in the refrigerator overnight first. Then, reheat them in the air fryer for a few minutes to restore their texture.
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Frequently asked questions
Cooking times can vary depending on the quantity of onions and the desired texture. For thinly sliced onions, a cooking time of around 12 to 15 minutes at 300 degrees Fahrenheit is a good starting point. If you want crispier onions, reduce the cooking time slightly. For softer, more caramelized onions, extend the cooking time by a few minutes.
Slice the onions thinly and evenly. Coat the onions with a small amount of oil and season with salt and pepper, or other seasonings of your choice. Preheat your air fryer to around 300-375 degrees Fahrenheit. Place the onions in the air fryer basket, spreading them out as much as possible. Cook for 10-15 minutes, stirring or shaking the basket every 5 minutes to ensure even cooking.
Air-fried onions are a versatile side dish that can be served on their own or used as a topping for burgers, sandwiches, hot dogs, eggs, salads, soups, curries, pizzas, and more. They can also be added to dishes like biryani, pulao, or French onion soup to enhance the flavor.
