Preheat the oven to 375 degrees and lightly grease a 12-cup muffin tin.
In a large bowl, combine the ground chicken, 1/4 cup of the buffalo sauce, breadcrumbs, egg, celery, blue cheese, garlic powder, salt, and pepper.
Mix with your hands until the ingredients are evenly distributed but the mixture still feels loose.
Divide the mixture evenly among the 12 muffin cups, pressing it down gently to fill each cup.
Spoon the remaining 1/4 cup buffalo sauce over the tops of the muffins.
Bake for 20 to 25 minutes until the internal temperature reaches 165 degrees.
Let the muffins rest in the tin for 5 minutes before removing them.