All air fryers are slightly different, but for the most part, they all cook a little more powerfully than a conventional oven you have in your kitchen. That means that a lower temperature for a slightly longer cook time is best for making air fryer cookies. If your cookies are starting to cook faster than you're comfortable with, lower the temperature and check every minute. You'll also want to take them out when they are still soft in the middle, then let them cool completely.