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Air Fryer Crispy Fried Onions

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  • Prep Time: 15 minutes

  • Cook Time: 20-25 minutes (depending on air fryer model and batch size)

  • Total Time: 35-40 minutes

  • Intensity Level: Easy. If you can slice an onion and toss it in a bowl, you can make these. The most “intense” part is keeping an eye on them towards the end to ensure they don’t burn.

Why You’ll Love This Recipe

  • So Much Healthier: Uses only 1-2 tablespoons of oil compared to the cups needed for deep-frying.

  • Perfectly Crispy: The air fryer circulates hot air to create an incredibly even, crunchy coating.

  • Customizable: You control the seasoning. Make them smoky, spicy, or classic.

  • Superior Flavor: Fresh onions and homemade seasoning blow the store-bought versions out of the water.

Ingredients

  • 2 large yellow or white onions

  • 1 cup buttermilk (see notes for dairy-free alternative)

  • 1 cup all-purpose flour (or gluten-free 1:1 baking flour)

  • 1 teaspoon garlic powder

  • 1 teaspoon smoked paprika (or regular paprika)

  • 1/2 teaspoon cayenne pepper (optional, for heat)

  • 1 teaspoon fine sea salt, plus more for finishing

  • 1/2 teaspoon freshly ground black pepper

  • 1-2 tablespoons avocado or vegetable oil (for spraying)

Instructions

1. Prep the Onions:
Peel the onions and slice them into thin, uniform rings, about 1/4-inch thick. A mandoline slicer is great for this, but a sharp knife works perfectly. Place the slices in a large bowl and separate the rings.

2. The Buttermilk Soak (The Secret to Less Bite):
Pour the buttermilk over the onion rings and toss to coat. Let them soak for at least 10-15 minutes. This step mellows out the raw, pungent flavor of the onion and helps the flour mixture adhere.

3. Create the Seasoned Coating:
In a separate large bowl or a shallow dish, whisk together the flour, garlic powder, smoked paprika, cayenne (if using), 1 teaspoon of salt, and black pepper.

4. Dredge the Onions:
Working in batches, take a handful of onion rings from the buttermilk, letting the excess drip off. Toss them in the seasoned flour mixture until they are completely and evenly coated. Use your other hand (keep one dry!) to ensure every nook and cranny is covered. Place the coated rings on a wire rack or a large plate while you finish the remaining batches. Don’t overcrowd them.

5. Preheat the Air Fryer:
Preheat your air fryer to 360°F (180°C) for 3-5 minutes. Preheating ensures they start cooking immediately for maximum crispiness.

6. Air Fry to Perfection:
Lightly spray the air fryer basket with a little oil. Place a single layer of the coated onion rings in the basket, making sure they aren’t overlapping too much (they can touch slightly, but shouldn’t be stacked). You will need to cook in batches.
Lightly spray the tops of the onions with oil. This is crucial for that golden-brown, crispy texture.
Air fry for 10-12 minutes, shaking the basket or flipping the rings halfway through. Keep a close eye on them during the last 2-3 minutes, as air fryer temperatures can vary. They are done when they are deeply golden brown and crispy.

7. Repeat and Rest:
Carefully remove the finished onions from the basket and place them on a paper towel-lined plate. Immediately sprinkle with a tiny pinch of extra salt. Repeat the process with the remaining onion rings.

8. Serve Immediately:
These are best enjoyed fresh and hot! Pile them high on a burger, sprinkle them over a green bean casserole, or just dive in with your favorite dipping sauce (chipotle aioli or ranch are incredible).

Pro-Tips for Success

  • Don’t Skip the Soak: The buttermilk soak is not just for coating; it tames the raw onion flavor, making them sweet and delicious after cooking.

  • Uniform Slicing is Key: Try to slice the onions the same thickness so they all cook at the same rate. Thin slices get the crispiest!

  • Work in Batches: Overcrowding the air fryer basket will trap steam and lead to soggy onions. Give them room to breathe!

  • Keep an Eye on Them: Air fryers are powerful! The difference between perfectly golden and burnt can be a minute, especially towards the end of the cooking time.

Variations

  • Spicy Buffalo: Toss the finished hot onions in your favorite buffalo wing sauce for a sticky, spicy treat.

  • Zesty Ranch: Add 1 tablespoon of dry ranch seasoning mix to the flour mixture.

  • Everything Bagel: Replace the spices with 2 tablespoons of Everything Bagel seasoning.

  • Dairy-Free/Vegan: To make this vegan, soak the onions in a mixture of 1 cup of unsweetened almond or oat milk mixed with 1 tablespoon of lemon juice or apple cider vinegar. Let it sit for 5 minutes to create a “vegan buttermilk.”

Storage & Reheating

  • Storage: Store any leftovers in an airtight container at room temperature for up to 2 days. Do not refrigerate, as this will make them soft.

  • Reheating: The best way to bring them back to life is in the air fryer! Reheat at 350°F (175°C) for 2-4 minutes, until hot and crispy. You can also use a regular oven.

Nutrition Information

Please note: The following nutrition information is an estimate and is provided for informational purposes only. It does not include any optional dips or additional salt to taste. Values will vary based on the specific ingredients and exact quantities used.

Serving Size: Approx. 1/4 cup
Calories: 115
Fat: 4.5g

  • Saturated Fat: 0.7g

  • Trans Fat: 0g
    Carbohydrates: 16g

  • Fiber: 1.5g

  • Sugar: 3.5g
    Protein: 3g
    Sodium: 210mg
    Potassium: 120mg
    Calcium: 40mg
    Iron: 0.8mg

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