01 - Preheat oven to 375°F and grease an 8x8-inch baking dish with cooking spray or butter.
02 - In a large mixing bowl, combine softened cream cheese, sour cream, and buffalo wing sauce. Whisk until completely smooth and creamy.
03 - Add shredded chicken to the bowl along with garlic powder, onion powder, black pepper, and salt. Mix thoroughly to coat chicken evenly.
04 - Fold in half of the shredded mozzarella and cheddar cheeses until distributed throughout the mixture.
05 - Spread the chicken mixture evenly into the prepared baking dish, pressing lightly to create a uniform layer.
06 - Sprinkle remaining mozzarella and cheddar cheeses over the top in an even layer.
07 - Bake for 30 to 35 minutes until cheese is melted, bubbly, and golden brown on top.
08 - Remove from oven and let stand for 5 minutes. Top with sliced green onions, blue cheese crumbles, and chopped parsley if desired.