Flaky Onion Rings are light, crisp and full of flavor thanks to a spicy buttermilk soak and a simple flour coating that fries up beautifully.
Why These Onion Rings Work
These crispy onion rings use a buttermilk marinade to soften the onions and add flavor. The hot sauce gives a gentle kick without overpowering the natural sweetness of the onions. A quick dredge in seasoned flour creates those light, flaky layers that crisp to golden brown instantly in hot oil.
- The coating stays crisp because the flour and baking powder puff slightly in the oil. I use the same trick in my light and crispy fried chicken recipe.
- The buttermilk marinade tenderizes the onions so every bite is soft inside but crunchy outside.
- A high frying heat ensures fast browning without greasiness.
What You Need for Flaky Onion Rings
Full amounts are in the recipe card below.
- Buttermilk for a tangy marinade that softens the onions.
- Hot sauce to add flavor to the soak. I like Frank’s or Louisana Hot Sauce.
- Cayenne pepper for adjustable heat.
- Sweet onions like Vidalia, Maui or Walla Walla cut in thick slices.
- All purpose flour for the flaky coating.
- Baking powder to help the crust puff lightly.
- Kosher salt for seasoning.
- Vegetable oil (peanut oil, avocado oil, or sunflower oil) for deep frying.
Variations and Add Ins
- Garlic flavor: mix a little garlic powder into the dredging flour.
- Smoky finish: use smoked paprika for a mild earthy flavor.
Tools That Help
- Deep fryer or heavy pot to maintain steady oil temperature.
- Wire rack to keep the rings crisp while draining.
- Tongs for clean and easy flipping.
- Thermometer to confirm oil is at 375 degrees F.
How to Make Flaky Onion Rings
The steps are simple. Marinade the onion slices, dredge them in flour and fry until crisp and golden.
Soak the Onions
Whisk buttermilk, hot sauce, and cayenne in a bowl. Separate the onion slices into rings and stir them into the mixture. Chill to hydrate and soften.
Prepare the Coating
Whisk flour, baking powder, salt and cayenne in a medium bowl. Heat the oil while the onions finish chilling so you are ready to fry as soon as the rings are coated.
Coat and Fry
Lift the onion rings from the marinade, letting excess drip off. Coat in the flour mixture and shake off the extra. Fry in batches until deep golden and crisp. Transfer to the wire rack lined with paper towel and sprinkle with salt.
If you love crispy satisfaction, you’ll love my easy chicken schnitzel recipe, too.
Common Mistakes to Avoid
- Oil too cool results in soggy rings. Always check the temperature.
- Overcrowding the pot drops the heat and prevents crispness.
- Skipping the chill time weakens the coating and reduces flakiness.
- Leaving too much marinade on the onions causes clumping. Let them drip before dredging.
Make Ahead and Storage
Can You Make Onion Rings Ahead
- Prep ahead: Slice onions and mix the marinade up to one day in advance.
- Chill the rings only shortly before frying. Longer soaks soften too much.
- Do not coat ahead. The flour mixture becomes gummy if it sits.
Storing Leftovers
- Fridge: Store in a container for up to 2 days.
- To re-crisp: Reheat at 400 degrees F on a wire rack until hot.
- Microwave: Will soften the crust, so avoid if possible.
Try my crispy, fluffy fried potatoes, too!
How to Serve Flaky Onion Rings
Serve as a side for chicken burgers, flat iron steak or meatloaf sandwiches. These are also excellent piled onto a platter with dipping sauces like ranch, spicy mayo or baja sauce.
Flaky Onion Rings (Light and Crispy!)
Ingredients
- 3 cups buttermilk
- ¾ cup hot sauce like Frank's or Louisiana Hot Sauce
- 3 tsp cayenne pepper divided use
- 2 large sweet onions such as Viladia, Maui or Walla Walla, sliced crosswise into 1/2-inch-thick rings
- Vegetable oil for deep frying
- 2 cups all-purpose flour
- 2 tsp baking powder
- 1 tsp kosher salt plus more for seasoning
Instructions
- Combine buttermilk, hot sauce, and 2 teaspoons of the cayenne in a large mixing bowl. Separate the onion slices into individual rings (discard the small center portions or save for another purpose). Add the onion rings to the buttermilk mixture and stir gently to coat. Refrigerate until chilled, 45 minutes to 1 hour.
- Preheat 2 to 3 inches of vegetable oil in a dutch oven to 375ºF. Position a wire rack over a paper-towel-lined baking sheet.
- In a medium bowl, combine the flour, baking powder, salt and remaining 1 teaspoon cayenne.
- Working in batches, remove the onion rings from the buttermilk mixture, allowing the excess to drip back into the bowl, and dredge them in the flour mixture. Remove the coated rings from the flour, shake to remove any excess, and place them on the wire rack. Repeat until you have coated all the onion rings.
- Working in batches, fry the onion rings, turning them occasionally, until crisp and golden, about 3 minutes. Transfer them to the wire rack to drain briefly. Season lightly with salt and serve immediately.
Notes
- For milder heat, reduce the cayenne or skip the extra 1 tsp in the flour coating.
- Keep the oil close to 375°F. If it drops too low, the onion rings will absorb more oil.
- Fry in small batches so the temperature stays steady and the coating stays crisp.
- The “Safety Gap”: Never fill your pot or Dutch oven more than halfway with oil. When you drop the battered rings in, the oil will bubble up vigorously. If the pot is too full, you’re looking at a dangerous kitchen fire hazard.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
This is exactly how I like onion rings, with the thin flaky coating, not the thick puffy batter. But what kind of deep fryer are you using? That description sounds like just what I’d need to try making these!
I just use a dutch oven with a couple of inches of hot oil and check the temperature with an instant thermometer. I don’t own a deep fryer anymore.