Preheat oven to 300 degrees F. Line a large baking sheet with parchment paper.
Remove the thick stems from the kale. Place kale in a large bowl. Drizzle with olive oil and toss to coat or toss directly on the baking sheet. Sprinkle with salt and parmesan cheese and mix to coat.
Spread kale into a single layer. Bake for 7-10 minutes or until crispy.
Air Fryer Kale Chips
Preheat your air fryer to 350° F.
Place the kale in a large bowl, toss in the olive oil and salt, and other seasonings. Place the kale on your air fryer rack (single layer) or in the basket.
Air fry for 5 to 7 minutes, depending on your air fryer. When it is crispy, remove the kale from the air fryer and enjoy.
Notes
Be careful not to burn the kale - you may need to adjust the cooking time depending on the size of your kale pieces and your oven's temperature or your air fryer's power.