Start by slicing your yellow onion into ½‑inch rings, then separate them gently to avoid breakage. I whisk together the panko, garlic powder, onion powder, and salt in a bowl—this seasoned crust is key for flavor. In separate bowls, I set up the flour and beaten eggs. Then it’s a dip-flour, dip‑egg, coat‑with‑panko routine, pressing the breadcrumbs gently so they stick well. Letting them rest while you prep the batch helps the coating adhere better.
Once all rings are coated and resting on a tray, I let them chill briefly—about 10–15 minutes—in the freezer or fridge. This short chill firm-ups the coating, so it doesn't flake off when you place them in the air fryer basket. I learned this trick after a few rings fell apart mid-cook—it makes a huge difference in keeping them intact and evenly crisp.
Preheat your air fryer to 370°F. Arrange the onion rings in a single layer, ensuring they don’t overlap—this allows the hot air to circulate evenly. Then, lightly drizzle or spray them with olive oil; this small bit of oil is what gives them that golden, restaurant‑style finish without making them greasy. I air fry for about 8–11 minutes, flipping halfway through to ensure both sides crisp up equally .
Once they’re golden and crisp, transfer them straight to your serving plate and enjoy them while they’re hot. If you're cooking multiple batches and want everything warm, toss them all back in the air fryer for a quick 1–2 minutes just to reheat . Serve with tartar sauce, or get creative with spicy mayo, ranch, or BBQ dip.