1. Prepare the chicken: If your chicken isn’t already cooked, gently simmer it in water until fully cooked, then cool and shred.

2. Heat the oven: Preheat to 350°F and lightly grease a 9-by-9-inch baking dish.

3. Warm the base mixture: In a medium saucepan over medium-low heat, combine the cream cheese, ranch dressing, hot sauce, black pepper, and garlic powder. Stir until smooth and fully blended, then remove from heat.

4. Stir everything together: Add the shredded chicken, green onion, 1 cup mozzarella, and 1 cup cheddar to the warm sauce mixture. Mix well and transfer to the prepared baking dish.

5. Top and bake: Sprinkle the remaining mozzarella and cheddar over the top. Bake for 20–30 minutes, or until melted and bubbling around the edges.

6. Broil for color: Switch the oven to broil and cook for 2–3 minutes, just until the top turns golden. Remove promptly.

7. Serve: Enjoy warm with chips, crackers, or vegetables. Leftovers reheat well in the microwave or oven.