01 -
Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish.
02 -
Combine cream cheese, sour cream, mayonnaise, garlic powder, onion powder, salt, and pepper in a large bowl. Mix until smooth and fully blended.
03 -
Add the cooked chicken, steamed broccoli, and shredded cheddar cheese into the creamy mixture. Stir until all components are evenly coated.
04 -
Transfer the mixture into the prepared baking dish and spread evenly. Sprinkle grated Parmesan cheese on top if desired.
05 -
Bake uncovered for 25 to 30 minutes until heated through and the top is golden and bubbly.