Cooking roast beef in an air fryer has become popular due to its ability to retain moisture and create a crispy outer crust. Tasting Table recipe developer Susan Olayinka shares her technique for cooking moist roast beef in the air fryer. One important step is flipping the meat halfway through cooking to ensure even cooking and a nice crust. Other air fryer tips include preheating the device and using a meat thermometer to ensure the beef reaches a safe temperature. With these tips, you can achieve perfect roast beef in your air fryer.