Bring steaks to room temp: Take the steaks out of the fridge 20–30 minutes before cooking. Pat dry very well with paper towels.
Preheat the air fryer: Set to 400°F (200°C) for 5 minutes.
A hot basket helps create a better crust.
Season generously: Rub both sides with oil. Mix salt, pepper, garlic powder, and onion powder, then season the steaks on all sides. Press seasoning in so it sticks.
Arrange in basket: Place steaks in a single layer with space around them.
Don’t overlap. If your air fryer is small, cook in batches.
Air fry and flip: Cook at 400°F for 4–6 minutes, then flip. Add butter, smashed garlic, and herbs on top.
Finish to desired doneness: Continue cooking 3–6 minutes.
Aim for these internal temps: 120–125°F for rare, 130–135°F for medium-rare, 140–145°F for medium, 150–155°F for medium-well. Use an instant-read thermometer for accuracy.
Rest the steak: Transfer to a plate and rest 5–10 minutes. Spoon any melted herb butter from the basket over the steaks.
Slice and serve: Slice against the grain.
Finish with a tiny squeeze of lemon and a pinch of flaky salt if you like.