Before You Begin
Prepare all ingredients and grease your baking dish. Use cooked chicken, fully drained broccoli, and rice that is cooked but still slightly firm. Oven performance and ingredient moisture can vary, so rely on visual cues along with the time ranges in each step.
Preheat Oven
Preheat to 375°F (190°C). Lightly grease a 9×13-inch baking dish to prevent sticking.
Combine Base Ingredients
In a large bowl, gently mix cooked chicken, broccoli, and rice.
Visual cue: Ingredients should stay loose and evenly combined, not mashed.
Mix the Sauce
Whisk together soup, milk, sour cream, garlic powder, onion powder, salt, and pepper until smooth.
Visual cue: Sauce should look creamy with no lumps.
Assemble
Pour the sauce over the chicken mixture and fold gently. Stir in 1½ cups of cheese.
Visual cue: Everything should look evenly coated and moist.
Bake
Spread mixture into the baking dish and top with remaining cheese.
Bake 25–30 minutes.
Visual cue: Edges should be bubbly, and cheese should be melted with light golden spots.
Rest Before Serving
Let the casserole rest 5–10 minutes before serving so it sets properly.
Visual cue: Slices should hold their shape when scooped.