Preheat the air fryer to 360°F and lightly spray the basket with avocado or olive oil cooking spray.
Pat 3 medium skinless and boneless chicken breasts dry with paper towels.
Place the chicken breasts in a bowl. Pour 5 tablespoons buffalo sauce over the chicken, then add 1/2 teaspoon salt, 1/4 teaspoon garlic powder, and 1/4 teaspoon black pepper.
Toss the chicken in the bowl until evenly coated with the sauce and seasonings. Let the chicken marinate for 5 minutes.
Arrange the chicken breasts in a single layer in the air fryer basket, leaving space between pieces. If they do not fit without overlapping, cook in batches.
Air fry at 360°F for 10 minutes. Carefully flip each chicken breast and continue to air fry for an additional 5 minutes, or until an instant-read thermometer inserted into the thickest part reads 165°F.
Remove the chicken from the air fryer. Brush with a little extra buffalo sauce if desired.
Let the chicken rest for 5 minutes before slicing or serving.
Serve with celery and carrot sticks and blue cheese dressing or dip, if desired.