Add brussels to the air fryer basket. Air fry at 360°F for about 15-20 minutes. Shake and gently stir half way through, about 8 minutes into cooking. Make sure you shake at the halfway mark! You don’t wany to end up with uneven cooking. If needed, shake and toss a 3rd time to make sure it all cooks evenly.
Continue to air fry the brussels for the remainder of the time, or until the brussels are golden brown and cooked through. You can check earlier if needed to make sure nothing burns. Or you can add more time if needed to make sure it’s cooked through.