Preheat oven to 350 degrees F (175 degrees C). Grease 24 mini-muffin cups.
Stir chicken, Buffalo wing sauce, cream cheese, egg, and egg white together in a large bowl until well-mixed. Add Cheddar cheese and green onion; stir. Stir quinoa into chicken mixture. Spoon mixture into prepared mini-muffin cups.
Bake in the preheated oven until browned around the edges, 18 to 22 minutes.
