Make sure to spray the onion rings thoroughly with cooking spray to get the nice golden brown crunchy coating. Since some cooking sprays can damage cooking surfaces over time, you may want to place the coated onion rings on a baking sheet first and spray them before placing in the air fryer basket.Work in batches to avoid overcrowding the air fryer so the onion rings cook evenly. Air fryers have different capacities, so it may take more than two batches, especially if you're doubling the recipe. Serve each batch when it's ready or keep them warm in the oven.Divide the panko breadcrumb mixture in two. The battered rings will make the mixture sticky, so it’s best to half it so you can switch to the second part of the dry mixture after the first mix is starting to get sticky.Instead of paprika, you can add your favorite spices. Garlic powder, cayenne pepper, or chili are all great options.Place the rings in a single layer in the air fryer basket! You can put small onion rings in the bigger rings as long as they don’t touch each other! Half way through cooking, spray them again with cooking spray to make them even crispier and deeper brown color.You don’t need to turn the onion rings during the cooking process because they will cook evenly without flipping.