Cut cauliflower head into small 2-inch florets. Set aside.
Spray the air fryer basket with olive oil. Set aside.
In a large bowl, add the cauliflower florets, oil, salt, pepper, and garlic powder. Toss the florets to coat evenly.
Spread the cauliflower florets in a single layer in the basket and work in batches if you have too many florets.
Air fry for 12-15 minutes at 400°F (200°C), shaking the basket halfway. They are ready to remove from the air fryer when golden brown, crispy on the edges but not burnt, and still tender in the middle.
