Preheat the oven to 375°F and line a baking sheet with parchment paper or lightly grease a loaf pan.
In a large bowl, combine the ground chicken, panko breadcrumbs, egg, buffalo wing sauce, crumbled blue cheese, celery, parsley, onion powder, salt, and black pepper.
Mix with clean hands or a spatula until the ingredients are evenly distributed but not overworked.
Shape the mixture into a loaf about 8 inches long and place it on the prepared baking sheet, or press it into the loaf pan.
Bake for 45 to 50 minutes until the internal temperature reaches 165°F.
Let the meatloaf rest for 5 minutes, then slice and serve with extra buffalo sauce and blue cheese crumbles on top.