Boil the chicken breasts until cooked through, then shred with forks.
In a large mixing bowl, combine cream cheese, ranch dressing, hot sauce, black pepper, and garlic powder.
Add shredded chicken, half the mozzarella, half the cheddar, and chopped green onions; mix well.
Transfer mixture to a baking dish and spread evenly.
Sprinkle remaining mozzarella and cheddar cheese on top.
Bake in a preheated oven at 350°F (175°C) for 20 minutes or until bubbly and golden.
Serve hot with your favorite chips, veggies, or Low-Carb Pea Salad.