Preheat your air fryer to 375°F (190°C).
In a large bowl, toss the cauliflower florets with olive oil, garlic powder, smoked paprika, salt, and black pepper.
Place the seasoned florets in the air fryer basket in a single layer.
Cook for 12-15 minutes, shaking the basket halfway through, until the cauliflower is golden and crispy on the edges.
Sprinkle with parmesan and parsley if you like, then serve warm with your favorite dip.