Cut the cauliflower into florets and put them into a large bowl.
Drizzle the olive oil over the cauliflower and then sprinkle it with salt, black pepper, and garlic powder to taste. Then toss everything together until the florets are evenly coated in the oil and seasonings.
Put the seasoned cauliflower into the air fryer basket and cook it at 380℉ for 15 minutes, shaking it halfway through the cooking time. If it's still not tender after 15 minutes just let it cook for another minute or two.
Remove the cooked cauliflower from the air fryer and enjoy!