Description
These incredibly crispy, low-carb Parmesan Onion Rings are the perfect guilt-free snack, appetizer, or side dish. Made with just two main ingredients and cooked in the oven or air fryer, they’re quick, easy, and packed with savory flavor.
Ingredients
Scale
- 1 large Yellow Onion or Sweet Onion, peeled and sliced into 1/4-inch thick rings
- 1 cup (about 4 ounces) Freshly Shredded Parmesan Cheese
- 1 tablespoon Olive Oil (optional)
- 1/2 teaspoon Smoked Paprika (optional)
- 1/4 teaspoon Garlic Powder (optional)
- Pinch of Salt (optional)
- Pinch of Black Pepper (optional)
Instructions
- Prep the Onions: Peel your large yellow or sweet onion and slice it into 1/4-inch thick rings. Gently separate the rings. You’ll want to use the larger, outer rings for the best ‘onion ring’ shape, but don’t discard the smaller inner rings; they’ll still crisp up beautifully!
- Season (Optional): In a medium bowl, drizzle the separated onion rings with 1 tablespoon of olive oil, if using. Toss gently to coat. Then, sprinkle with 1/2 teaspoon smoked paprika, 1/4 teaspoon garlic powder, a pinch of salt (remember Parmesan is salty!), and a pinch of black pepper. Toss again to ensure even coating.
- Arrange: Lay the seasoned onion rings in a single layer on your prepared baking sheet or in your air fryer basket. Make sure they aren’t overlapping too much, as this is key for crispiness. You might need to work in batches, especially with an air fryer.
- Parmesan Time: Generously sprinkle about 1/2 to 1 tablespoon of freshly shredded Parmesan cheese over each onion ring. Don’t be shy; the cheese is what creates that amazing crispy crust!
- Oven Method – Preheat: Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper for easy cleanup and to prevent sticking.
- Oven Method – Bake: Place the baking sheet with the Parmesan-topped onion rings into the preheated oven. Bake for 15-20 minutes, or until the Parmesan is golden brown and bubbly, and the onion rings are tender-crisp. The edges should look delightfully caramelized.
- Oven Method – Cool: Carefully remove from the oven and let the Parmesan onion rings cool on the baking sheet for 5-10 minutes. They will crisp up even more as they cool.
- Air Fryer Method – Preheat: Preheat your air fryer to 375°F (190°C) for 3-5 minutes.
- Air Fryer Method – Air Fry: Carefully arrange the Parmesan-topped onion rings in a single layer in your air fryer basket. You will likely need to cook these in batches. Air fry for 8-12 minutes, shaking the basket gently halfway through, until the Parmesan is golden brown and crispy, and the onions are tender. Keep a close eye on them, as air fryer temperatures can vary.
- Air Fryer Method – Cool: Transfer the crispy Parmesan onion rings to a wire rack or plate and let them cool for 5 minutes. This allows them to firm up and reach maximum crispiness.
Notes
For the best crispiness, always use freshly shredded Parmesan cheese from a block. Pre-shredded cheese often contains anti-caking agents that can hinder proper melting and crisping. Avoid overcrowding your baking sheet or air fryer basket to ensure even cooking and maximum crunch. Serve immediately for optimal texture, or follow storage and reheating instructions for leftovers.
- Prep Time: 10 minutes
- Cook Time: 10-20 minutes
- Category: Appetizer, Snack, Side Dish
- Method: Baking, Air Frying
- Cuisine: American
Nutrition
- Serving Size: 1/4 of recipe
- Calories: 135 kcal
- Sugar: 3.5 g
- Sodium: 350 mg
- Fat: 9 g
- Carbohydrates: 6 g
- Fiber: 1.5 g
- Protein: 10 g