1. Preheat your air fryer to 400°F. This is crucial for cooking porterhouse steak in air fryer as it ensures the steak starts cooking at the right temperature for a perfect sear.

2. Prepare your porterhouse steak while the air fryer is heating. Allow it to rest at room temperature for about 30 minutes before cooking. This step helps in achieving desired steak doneness more evenly.

3. Season the steak generously on both sides with salt and pepper. Feel free to add your favorite steak seasoning for extra flavor. Brush both sides with olive oil to help the seasoning stick and to achieve a great crust.

4. Place the steak in the air fryer basket. Ensure it’s in a single layer without overlapping for even air circulation and cooking.

5. Cook the steak for 6 minutes, then flip and cook for an additional 6 minutes for medium-rare doneness. This is a general guide; adjust the time based on your desired doneness and steak thickness.

6. Use a meat thermometer to check the internal steak temperature. For medium-rare, look for a temperature of 130-135°F. Adjust the cooking time if necessary for medium (135-145°F) or well-done (155-165°F).

7. Let the steak rest for about 5 minutes after cooking. This allows the juices to redistribute throughout the steak, making it juicier and more flavorful when you cut into it.