Crispy Gluten Free Onion Rings (Fried or Baked)
These gluten free onion rings come out shatteringly crisp, with a light, almost tempura-like coating that actually stays on.
Fried or baked, they’re the side dish that steals the show and keeps everyone reaching for more.
Why This Method Stays Crunchy
The coating uses a mix of gluten free flour and cornstarch, plus a shot of sparkling water to keep it airy. The result is a ring that crunches when you bite in, not a heavy, greasy shell.
I’ve tested more batches than I care to admit, and this is the version that holds its crisp the longest, even on a plate next to a burger.
Ingredients
- 2 large sweet onions: Vidalia or Walla Walla give the mildest, sweetest rings.
- 1 cup gluten free all-purpose flour blend: use a cup-for-cup blend with xanthan gum for structure.
- ½ cup cornstarch: makes the coating extra crisp without toughness.
- 1 teaspoon paprika: lends a warm, savory note.
- 1 teaspoon garlic powder: rounds out the flavor without overpowering.
- ½ teaspoon salt, plus more for sprinkling
- 1 cup cold sparkling water: the bubbles keep the batter light. For a richer batter, swap in ½ cup buttermilk and ½ cup water.
- 1 large egg
- Vegetable or avocado oil: for frying, or cooking spray for baking.
Variations / Substitutions
- Spicy variation: add ½ teaspoon cayenne pepper to the dry mix for rings with a slow, warm heat.
- Dairy-free: use sparkling water and a splash of unsweetened dairy-free milk instead of buttermilk.
- Flour swaps: a blend of white rice flour and fine almond flour works well, but avoid gritty flours like straight coconut.
If you’re in the mood for another crunchy gluten free favorite, try my Gluten Free Chicken Tenders.
How to Make Gluten Free Onion Rings
Step 1: Slice the Onions
Slice the tops and roots off 2 large sweet onions, then peel away the papery skin. Cut each onion crosswise into ½-inch thick rounds and separate them into individual rings. Discard the tiny center rings or save them for another use.
Pat the rings very dry with a clean kitchen towel. Any moisture trapped under the batter will create steam and make the coating slide off, so don’t skip this part.
Step 2: Whisk the Batter
In a large mixing bowl, whisk together 1 cup gluten free flour, ½ cup cornstarch, 1 teaspoon paprika, 1 teaspoon garlic powder, and ½ teaspoon salt until no lumps remain. In a separate small bowl, beat 1 large egg with 1 cup cold sparkling water, then pour the wet mixture into the dry ingredients. Whisk just until a smooth, pancake-like batter forms.
The batter should coat the back of a spoon without running off too quickly. If it seems too thick, add a tablespoon more sparkling water. If it’s too thin, sprinkle in a little more flour.
Step 3: Dredge and Coat the Rings
Line a baking sheet with parchment paper and set a wire rack over another baking sheet. One at a time, dip a dry onion ring into the batter, letting the excess drip off, then place it on the parchment-lined sheet. Repeat until all rings are coated.
Work in small batches so the rings don’t stick together. If the batter thickens as you work, give it a quick stir. You’ll have just enough coating for 2 large onions.
Step 4: Fry or Bake the Rings
If frying, pour 1½ to 2 inches of oil into a heavy-bottomed pot and clip on a deep-fry thermometer. Heat the oil to 350°F (175°C). Carefully lower 4 to 5 coated rings into the hot oil and fry for 2 to 3 minutes, flipping once with a slotted spoon, until deep golden and the bubbles around the rings slow down. Remove to the wire rack and repeat with remaining rings.
If baking, preheat your oven to 425°F (220°C). Arrange the coated rings in a single layer on the wire rack without touching, and spray them generously with cooking spray. Bake for 18 to 22 minutes, flipping each ring halfway through, until the coating is dry, set, and the edges are a deep brown.
Step 5: Drain, Season, and Serve
The minute the rings come out of the oil or oven, sprinkle them with a pinch of flaky salt while they’re still piping hot. The salt will stick better and the heat carries the seasoning right into the crust.
Pile the onion rings onto a plate or a board and serve right away with your favorite dipping sauce. They’re at their loudest crunch within the first 15 minutes, so don’t wait.
Tips for the Crispiest Onion Rings
- Keep the batter cold: chill the sparkling water and don’t let the batter sit out on the counter.
- Pat the onion rings bone-dry before dipping. Even a little water is the enemy of a clinging coating.
- Don’t overcrowd the pot or baking sheet. Hot oil drops in temperature and baking rings steam if they touch.
- A wire rack is your best friend. It lets air circulate, keeping the bottoms from getting soggy.
- For an even airier coat, whisk 1 teaspoon baking powder into the dry mix. It reacts with the acid in sparkling water or buttermilk.
Cook times by method:
| Method | Temperature | Time |
|---|---|---|
| Deep Fry | 350°F (175°C) | 2 to 3 minutes per batch |
| Oven Bake | 425°F (220°C) | 18 to 22 minutes, flipping halfway |
Keeping Leftover Onion Rings Crispy
- Refrigerate: store cooled rings in an airtight container for up to 3 days.
- Reheating: reheat in a 400°F oven or air fryer for 4 to 5 minutes to recrisp. Skip the microwave, it turns them soft.
What Goes Well With Onion Rings
These rings are a natural partner for a juicy cheeseburger or a grilled chicken sandwich. The crunch holds up next to a pan-seared steak, and they’re perfect for dipping into ketchup, ranch, or a smoky chipotle aioli.
Frequently Asked Questions
Why did my batter slide off the onion rings?
Usually because the onion wasn’t dry enough. Moisture creates a steam barrier between the onion and batter. Pat the rings thoroughly and consider giving them a very light dusting of gluten free flour before dipping.
Can I make these in an air fryer?
Yes. Arrange coated rings in a single layer in your air fryer basket, spray with oil, and cook at 375°F (190°C) for 10 to 12 minutes, shaking the basket halfway through.
Can I prep the onion rings ahead of time?
The coated rings lose their texture if they sit. What you can do: slice and separate the onions up to a day ahead and keep them in a sealed container in the fridge. Bring them to room temperature and pat dry before coating.
Do I really need the sparkling water?
It makes a real difference in lightness, but you can swap in plain cold water plus ½ teaspoon of baking powder. The carbonation gives the batter a delicate puff that’s hard to replicate otherwise.
Gluten Free Onion Rings Recipe
Ingredients
Method
- Slice the onions into ½-inch thick rings and separate them. Pat the rings completely dry with a towel.
- In a large bowl, whisk together the flour, cornstarch, paprika, garlic powder, and salt. In a small bowl, beat the egg with the sparkling water, then pour into the dry ingredients. Whisk until a smooth batter forms.
- Dip each dry onion ring into the batter, letting the excess drip off. Place them on a parchment-lined baking sheet as you go.
- For frying: heat oil to 350°F (175°C) and fry in batches for 2 to 3 minutes, turning once, until deep golden. For baking: preheat oven to 425°F (220°C), arrange rings on a wire rack set over a baking sheet, spray with cooking spray, and bake for 18 to 22 minutes, flipping halfway.
- Drain fried rings on a wire rack. Sprinkle immediately with flaky salt and serve while hot.
