Diner-style onion rings - shatteringly crisp outside, sweet and tender inside - made in the air fryer with a fraction of the oil. The double-dip breading is what makes them hold their crunch.
Why these beat the fryer basket at the diner
- Sweet onions turn silky in the air fryer while the crust stays crackly.
- Buttermilk in the batter tenderizes and helps the panko cling in a thick, even coat.
- A spray of oil browns the crumbs evenly with none of the greasy weight.
Here's what you'll need
Pick large, firm sweet onions - Vidalia if you can get them - and slice thick.
- 2 large sweet onions, sliced into 1/2-inch rings
- 1 cup flour
- 1 cup buttermilk (or milk with 1 tsp vinegar)
- 2 cups panko breadcrumbs
- 1 tsp smoked paprika
- 1/2 tsp garlic powder
- Olive oil spray, salt and pepper
- Ketchup or a smoky yogurt dip to serve
Here's how it comes together
- Separate the onion slices into rings and pat dry.
- Set up three bowls: seasoned flour, buttermilk, and panko mixed with paprika and garlic powder.
- Coat each ring flour, buttermilk, then panko, pressing the crumbs on firmly.
- Arrange in a single layer, spray with oil, and air fry at 390 F (200 C) for 8 to 10 minutes, flipping once, until deep golden.
- Salt while hot and serve immediately.
Things I learned while testing
- Thin rings vanish into the coating - a 1/2-inch slice keeps the sweet onion presence.
- Rings crisp best in one layer; stack them and they steam.
- A second light oil spray at the flip evens out the browning.
Make ahead and leftovers
- Bread the rings a few hours ahead and refrigerate on a tray.
- Re-crisp leftovers 3 minutes in a hot air fryer - they come back surprisingly well.
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