Wash your kale and set out on countertop on paper towels to completely dry.
Remove middle stems and cut leaves into large bite size pieces, they will shrink.
Put pieces into a bowl and drizzle olive oil on, sprinkle on seasoned salt or ranch dressing seasoning.
Use hands to massage salt and oil on to leaves.
Put half your prepared bunch into your air fryer basket
Close your air fryer lid (attached on Ninja Foodi), press air crisp at 390 degrees for 2 minutes.
Lift lid and flip kale chips on to the other side to crisp evenly.
Re set air crisp at 390 degrees for another 2 minutes (or set to 4 minutes and flip halfway through). Then remove and do the same for the 2nd half of your batch of prepared kale.
Kale chips should be crispy on both sides, if you have a bit larger bunch you may need to add another minute at the very end to ensure all pieces are very crispy like chips. Enjoy immediately for best results.