Step 1

Let steak stand at room temperature for 30 minutes.

Step 2

Sprinkle both sides of steaks evenly with salt and 1/4 teaspoon of the pepper. Preheat air fryer to 400°F for 10 minutes. Place steak in fryer basket, and coat top with cooking spray. Cook until desired degree of doneness, 6 minutes for medium-rare, 8 minutes for medium, 10 minutes for medium-well, or 12 minutes for well done. Remove steaks from basket; let rest 5 minutes.

Step 3

Meanwhile, stir together butter, parsley, garlic, rosemary, zest, and remaining 1/4 teaspoon pepper in a bowl until combined. Serve butter alongside steaks.