Begin by preheating your oven to 350°F (175°C) to prepare for baking.
In a large mixing bowl, combine the shredded chicken with buffalo sauce. Use a spatula or spoon to mix thoroughly until the chicken is completely coated in the sauce.
Add the softened cream cheese to the chicken mixture. Blend well until the ingredients are combined into a smooth and creamy texture.
Fold in half of the shredded cheddar cheese and half of the mozzarella cheese, setting aside the remainder for topping later. Pour in the ranch dressing and add the chopped green onions, mixing until fully integrated. Season the mixture with salt and pepper according to your taste.
In a baking dish, create an even layer of crushed tortilla chips at the bottom, providing a crunchy base for the dish.
Carefully pour the buffalo chicken mixture over the layer of tortilla chips, smoothing it out to ensure an even distribution.
Generously sprinkle the remaining cheddar and mozzarella cheese on top of the chicken mixture, creating a cheesy layer that will melt beautifully during baking.
Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the cheese is melted, bubbly, and has developed a lovely golden color.
Once baked, remove from the oven and let it cool for a few minutes to set. If desired, garnish with additional chopped green onions for a fresh touch before serving.
Notes
Serve with extra tortilla chips and celery sticks for dipping.