Cut the jalapenos in half lengthways, remove the seeds and membranes, and then set aside.
Add the chicken, cream cheese, cheddar cheese, buffalo sauce, dressing, onion, garlic powder, salt, and pepper to a medium bowl and mix until well combined.
Fill each jalapeno half with the cream cheese mixture.
Add a single layer of jalapenos to the air fryer. Cook at 375 degrees F for 5-8 minutes or until the filling is bubbly and golden and the peppers are tender. You do not need to preheat the air fryer. Depending on your air fryer's size, you may need to cook them in batches.
Allow the jalapenos to rest for 3-5 minutes so the filling firms slightly, and serve with ranch, blue cheese dressing, or your favorite dipping sauce.
Notes
Leftovers can be stored in an airtight container in the refrigerator for up to two days. They can be reheated in the air fryer at 300 degrees F for 5-8 minutes.
The filled jalapenos can be prepared up to 24 hours in advance. Cover the filled peppers with plastic wrap and refrigerate them until ready to cook. You may need to add a minute or two to the cooking time to counter the chill on the filling.
Wear gloves when prepping the jalapenos. Jalapenos contain an oil that can cause a burning sensation on your skin.
The easiest way to remove the seeds and membrane is to scoop them out with a small spoon.
Use tongs and keep the jalapenos as level as possible when removing them from the air fryer, so the filling doesn't slide out of the pepper. The filling will firm up after sitting for about 5 minutes.
If you are cooking the jalapeno poppers in batches, you can keep the cooked ones warm in a 200-degree F oven until you are ready to serve.
Select the largest jalapenos you can find, so they hold more filling. You want to select peppers that are similar in size, so they cook evenly.
The jalapeno poppers can be baked in a 400-degree F oven for 15-20 minutes.