Step 1Preheat & prep: Preheat oven to 375°F. Lightly grease a 9×13 baking dish.
Step 2Add ingredients: Add uncooked pasta, shredded chicken, broccoli, garlic powder, onion powder, salt, Italian seasoning, and black pepper to the dish. Toss gently to combine.
Step 3Add liquids: Pour chicken broth and milk over everything, making sure most of the pasta is submerged.
Step 4Add cream cheese: Place the whole block of cream cheese directly in the center of the dish.
Step 5Bake covered: Cover tightly with foil and bake for 35 minutes.
Step 6Stir: Remove from oven and stir well—the cream cheese will melt into a rich, creamy sauce.
Step 7Add cheese: Sprinkle mozzarella and Parmesan evenly over the top.
Step 8Bake uncovered: Return to the oven uncovered for 10–15 minutes, until bubbly and lightly golden.
Step 9Rest & serve:
Let rest for 5–10 minutes before serving to allow the sauce to thicken.