Use gloves or extra care when slicing the jalapeños in half, lengthwise. Use a small spoon to scoop out all the seeds and membranes, to hallow-out the jalapeño halves. Set aside.
In a small bowl mix together the cream cheese, sharp cheddar cheese, green onions, garlic powder, salt and black pepper until fully combined. Spoon the mixture into the peppers, about 1 tbsp each pepper.
In another small dish, combine the panko breadcrumbs and melted butter and mix to coat the crumbs evenly with the butter. Dip the cream cheese part of the pepper into the crumbs and coat evenly.
Lay the peppers in the air fryer in an even layer and cook at 375 degrees F. for 5 to 8 minutes.*
*Air fryer times can vary based on the power of your air fryer. If your air fryer is preheated, the peppers will cook faster, so keep an eye on them.OVEN INSTRUCTIONS - Prepare peppers according to instructions and then place on a foil-lined baking sheet. Bake in 425 degree F oven for 12 to 15 minutes.