Step 1: Bring to Room Temperature and Season: Remove the steak from the refrigerator and let it sit at room temperature for 20–30 minutes. This is non-negotiable for even cooking — a cold steak will be overcooked on the outside and raw in the center. Pat the steak completely dry with paper towels. Moisture is the enemy of browning. Season both sides generously with salt and pepper, then brush lightly with olive oil. The oil helps conduct heat and promotes the Maillard reaction that creates the flavorful crust.
Step 2: Preheat the Air Fryer: Preheat your air fryer to 200°C (400°F) for 3 minutes with the basket empty. Preheating is essential for steak — the steak needs to hit a hot surface immediately to sear. Without preheating, the steak warms gradually and "sweats," producing a gray, steamed appearance instead of a brown, caramelized crust.
Step 3: Sear the First Side: Place the seasoned steak in the hot basket. Cook at 200°C (390°F) for 5 minutes. Do not open the basket during this time — every time you open it, you lose heat and interrupt the searing process. After 5 minutes, the first side should be deeply browned with a caramelized crust. Use tongs to flip the steak carefully.
Step 4: Cook the Second Side to Temperature: Flip the steak and cook for another 3–5 minutes, depending on your desired doneness. For medium-rare (the sweet spot for most steaks), aim for an internal temperature of 52°C (125°F) when you remove it — carryover cooking will bring it to 55°C (130°F) during resting. Use an instant-read thermometer inserted into the thickest part. If you don't have a thermometer, medium-rare feels like the flesh between your thumb and index finger when you touch them together.
Step 5: Rest and Finish with Herb Butter: Transfer the steak to a cutting board and let it rest for 5 minutes. This rest is crucial — it allows the juices to redistribute throughout the meat. Cutting too early causes a flood of juices on the board and dry steak on the plate. While resting, place the butter and fresh herbs in the warm air fryer basket for 30 seconds to melt. Slice the steak against the grain and drizzle with the herb butter before serving.