01 - Preheat oven to 375°F. Grease an 8x8-inch baking dish with cooking spray or butter.
02 - In a large bowl, combine cream cheese, sour cream, and buffalo wing sauce. Stir until completely smooth and well blended.
03 - Add shredded chicken, garlic powder, onion powder, black pepper, and salt. Mix thoroughly to coat chicken evenly.
04 - Fold in half the mozzarella and cheddar cheeses until distributed throughout the chicken mixture.
05 - Spread the mixture evenly into the prepared baking dish. Top with remaining mozzarella and cheddar cheeses.
06 - Bake for 30-35 minutes, until cheese is bubbly and golden brown on top.
07 - Remove from oven and let cool for 5 minutes. Garnish with green onions, blue cheese crumbles, and parsley if desired.
08 - Serve hot with celery sticks, tortilla chips, or a green salad as accompaniments.