Preheat the air fryer to 390°F (200°C) for 3–5 minutes.
A hot basket helps the potatoes crisp faster.
Prep the potatoes. Rinse and dry well. Moisture is the enemy of crisp. Cut into 1-inch pieces so they cook evenly.
Season. In a large bowl, toss potatoes with olive oil, garlic powder, onion powder, smoked paprika, salt, and pepper until every piece is coated.
Load the basket. Arrange potatoes in a single layer.
A little overlap is fine, but avoid piling high. Work in batches if needed.
Air fry. Cook for 14–18 minutes, shaking the basket halfway. They’re done when edges are deep golden and a fork slides in easily.
Add the cheese. Sprinkle shredded cheddar over the hot potatoes in the basket.
Air fry 1–2 more minutes until melted and bubbly.
Top it off. Transfer to a serving platter. Add crumbled bacon, dollops of sour cream, green onions, parsley, and a drizzle of hot sauce or ranch if you like.
Taste and adjust. Finish with a pinch of salt and pepper to brighten the flavors. Serve hot.