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 creamy.
03 - Add shredded chicken, garlic powder, onion powder, black pepper, and salt. Mix thoroughly to coat all ingredients evenly.
04 - Fold in half the mozzarella and cheddar cheeses until distributed throughout the 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 bubbly and golden brown on top. The cheese should be fully melted and slightly crisped at edges.
07 - Remove from oven and let cool for 5 minutes to set. Garnish with green onions, blue cheese crumbles, and parsley if desired.
08 - Serve hot with celery sticks, tortilla chips, or a green salad on the side.