01 - Preheat oven to 350°F (180°C). Lightly grease a medium baking dish, approximately 1.5 quarts in capacity.
02 - In a large bowl, mix softened cream cheese, sour cream, ranch dressing, and Buffalo sauce until smooth.
03 - Fold in shredded chicken, cheddar cheese, and mozzarella cheese until evenly combined.
04 - Spread the combined mixture evenly into the prepared baking dish.
05 - Bake for 20 to 25 minutes until hot and bubbling. Optionally, broil for 2 to 3 minutes to achieve a golden top.
06 - Remove from oven and allow to cool slightly. Sprinkle with sliced green onions and chopped parsley if using.
07 - Serve warm alongside tortilla chips.