Prepare the Flank Steak: Score the surface of the steak (on one side) before cooking to help the absorption of the marinade. Run your knife diagonally across the surface of the steak, in a diamond pattern. Make the slices about ¼-inch deep, and space them roughly 1-inch apart. Drizzle the steak on both sides with olive oil.
In a small bowl, mix the fajita seasoning ingredients.
Rub ½ of the seasoning evenly onto both sides of the flank steak. (The other half of the seasoning will get added to the vegetables.) Let it marinate while you prepare the chipotle sauce.
Make the Chipotle Sauce: Combine all the chipotle sauce ingredients in a blender or food processor. Blend until smooth and creamy.
Preheat the Air Fryer: Preheat your air fryer to 400°F (200°C).
Cook the Steak: Place the seasoned flank steak in the air fryer basket. Cook for about 8-10 minutes, flipping halfway through, until it reaches your desired level of doneness. Remove at 129°F internal temperature for medium rare and let it rest while the vegetables are cooking. Our steak continued to 136°F.
Cook the Vegetables: After removing the steak, place the onions in the air fryer basket and spray with cooking oil. Cook for 2 minutes, then add in the remaining vegetables. Season the vegetables with the remaining fatija seasoning and stir. Cook for 8 minutes, shaking the basket halfway through or until they are tender.
Assemble the Fajitas: Warm the flour tortillas in the microwave or on a skillet.
Spread a spoonful of chipotle sauce on each tortilla. Top with slices of flank steak, the cooked vegetables, guacamole, pico de gallo, and fresh cilantro. Serve the fajitas immediately with extra chipotle sauce on the side.
Rate this Recipe: Last step! If you make this, please leave a review letting us know how it was!