01 - Preheat your oven to 350°F (180°C).
02 - In a sizable mixing bowl, thoroughly combine the softened cream cheese, sour cream, and ranch dressing until the mixture is smooth and well-incorporated.
03 - Fold in the shredded chicken and buffalo wing sauce, stirring gently until all ingredients are evenly distributed.
04 - Gently fold in 1 cup of shredded cheddar cheese along with all of the mozzarella cheese into the chicken mixture.
05 - Spoon the prepared mixture evenly into a medium baking dish, approximately 8x8 inches.
06 - Evenly sprinkle the remaining shredded cheddar cheese over the surface of the dip.
07 - Bake for 20 to 25 minutes, or until the dip is heated through, bubbling around the edges, and the cheese topping is lightly golden.
08 - Carefully remove the dish from the oven and allow it to rest for 5 minutes before serving.
09 - Serve warm, accompanied by tortilla chips.