Choose filet mignon steaks of similar thickness so they cook at approximately the same rate.

Use an instant-read meat thermometer to accurately monitor doneness, as cooking times vary by steak thickness and air fryer model.

For garlic butter, mix softened butter with minced garlic and optional chopped parsley.

For herb butter, combine softened butter with chopped rosemary, thyme, and parsley and spoon it over the cooked steaks.

For a pepper crust, increase the coarsely ground black pepper and press it onto the steaks before cooking.

For a spicy variation, add a small pinch of cayenne pepper or crushed red pepper to the seasoning.

Store cooled leftovers in an airtight container in the refrigerator for up to 3–4 days.

Reheat in the air fryer at about 350°F (175°C) for a few minutes, checking frequently to prevent overcooking.

Keep leftover steaks whole rather than slicing them before storage to help retain moisture.