Place chicken wings in a slow cooker. In a small bowl, mix together the buffalo sauce, melted butter, garlic powder, onion powder, paprika, salt, and black pepper.
Pour the buffalo sauce mixture over the wings, ensuring they are well coated. Cover and cook on high for 2.5 to 3 hours or until tender.
Once cooked, set oven to broil. Transfer wings to a baking sheet lined with foil. Place under broiler for 3-4 minutes until crispy.
Serve immediately with celery sticks and blue cheese dressing on the side.
Notes
Adjust the spiciness by adding more or less buffalo sauce, according to your preference.