Broccoli cooks quickly in the air fryer and can easily burn if you don’t keep an eye on it. To help prevent over-browning or burning, make sure your broccoli is cut into roughly the same size pieces. You’ll also want to make sure the florets are on the small side so they cook all the way through before the edges of the broccoli brown too much. Adding a little water to the bottom of your air fryer (below the basket) is also a great way to help prevent the air fryer from smoking and the broccoli from burning.