These air fryer keto onion rings use almond flour, Parmesan, and egg for a savory coating. A single layer helps the rings brown without deep frying.
15-Minute Air Fryer Keto Onion Rings
- Prep time: 7 minutes
- Cook time: 8 minutes
- Temperature: 390°F
- Yield: 2 servings
- Equipment: Air fryer and shallow bowls
Almond flour does not behave like wheat breading. Expect a delicate, crisp-speckled coating rather than a thick restaurant crust, and turn the rings carefully.
Ingredients
- 1 medium yellow onion
- 1 large egg
- 1 tablespoon water
- 1/2 cup fine almond flour
- 1/4 cup finely grated Parmesan
- 1/2 teaspoon garlic powder
- 1/2 teaspoon smoked paprika
- 1/4 teaspoon kosher salt
- Avocado-oil spray
How to Make Air Fryer Keto Onion Rings
- Preheat: Heat the air fryer to 390°F for 3 minutes.
- Slice: Cut the onion into 1/2-inch rounds. Separate 12 sturdy rings and blot them dry.
- Prepare: Whisk egg and water in one bowl. Mix almond flour, Parmesan, garlic powder, paprika, and salt in another.
- Coat: Dip each ring in egg, drain briefly, then press gently into the dry mixture.
Drain each egg-dipped ring briefly, then press on the almond-flour mixture. - Cook: Arrange one layer, mist lightly with oil, and air-fry for 8 minutes. Turn carefully at 5 minutes.
Arrange coated rings in one layer before air frying.
Crisping Checklist
- Onion rings are thick and dry.
- Excess egg drips away before coating.
- Dry mixture is pressed on gently.
- Rings do not overlap.
- They rest 2 minutes before serving.
Build a low-carb air-fryer plate with our keto chicken tenders, air fryer radishes, or two-ingredient cheese crisps.
Prevent Bare Spots
- Work with one ring at a time.
- Reserve half the dry coating until needed.
- Use tongs only after the coating sets.
- Spray from several inches away.
Air fryers differ in fan strength and basket size. Check at 6 minutes. Remove rings when the coating is browned and the onion is tender, before exposed almond flour turns bitter.
Allergens and Storage
Egg, milk, and almond are major allergens under FDA guidance. Check Parmesan and seasonings, and prevent cross-contact when cooking for someone with allergies.
- Refrigerate leftovers within 2 hours.
- Store covered for up to 3 days.
- Reheat at 375°F for 3 to 4 minutes.
- Do not leave above 90°F longer than 1 hour.
Coating Strategy
The dry mixture becomes damp as egg-coated rings pass through it. Divide it between two shallow bowls so later rings receive a cleaner, more even coating.
Do not press loose coating into the basket. Those crumbs can darken before the onion cooks. Lift each ring, tap it gently over the bowl, and then arrange it.
- Coat the largest onion rings first for easier, cleaner handling.
- Keep prepared rings in one layer.
- Wash hands thoroughly after handling raw egg and before serving.
Frequently Asked Questions
Can I use red onion?
Yes. Choose a firm, medium onion and keep the same 1/2-inch thickness. Flavor will be slightly sharper.
Why did the coating fall off?
The rings may have been wet, overcrowded, or turned too early. Blot well and wait until 5 minutes before flipping.