Preheat the air fryer: Set it to 400°F (200°C) for at least 5 minutes.
A hot basket gives you better browning.
Prep the steak: Pat the cubes dry with paper towels. Dry surface = better sear and less steaming.
Season well: In a bowl, toss the steak with oil, salt, pepper, garlic powder, onion powder, and paprika. Add red pepper flakes if you like heat.
Arrange in the basket: Spread the cubes in a single layer with space between pieces.
Work in batches if needed to avoid crowding.
Air fry: Cook for 6–9 minutes, shaking the basket halfway through. Aim for: Rare: 6 minutes
Medium-rare: 7–8 minutes
Medium: 8–9 minutes
Check doneness: Use an instant-read thermometer if you have one. Target 125–130°F for medium-rare, 135°F for medium.
They’ll rise a few degrees while resting.
Rest and finish: Transfer to a plate, toss with butter, and let rest 3–4 minutes. Sprinkle with parsley or flaky salt, and add a squeeze of lemon if you like.
Serve: Enjoy over rice, with roasted veggies, inside tacos, or as steak bites with your favorite dipping sauce.