Prepare the Ingredients

1. Cook the Chicken: Begin by cooking your chicken. You can grill, bake, or sauté it until it’s cooked through. Once done, chop the chicken into bite-sized pieces.
2. Steam the Broccoli: While the chicken is cooking, steam the broccoli florets until they’re bright green and tender, but still crisp. You can also blanch them in boiling water for a few minutes.
3. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish to prepare it for the bake.

Make the Sauce

1. Combine the Wet Ingredients: In a large mixing bowl, combine the cream of chicken soup, sour cream, and milk. Stir until smooth and well combined.
2. Add the Seasonings: To the sauce mixture, add the garlic powder, onion powder, salt, and pepper. Taste and adjust seasoning as needed.

Assemble the Bake

1. Layer the Chicken and Broccoli: In the prepared baking dish, spread the steamed broccoli evenly across the bottom. Top with the cooked chicken pieces, making sure everything is spread out.
2. Pour the Sauce: Pour the creamy sauce mixture evenly over the chicken and broccoli. Use a spatula to spread it out to cover everything.
3. Add the Cheese: Sprinkle the shredded cheddar and grated Parmesan cheese over the top of the sauce. This will create a melty, cheesy topping as it bakes.

Add the Crunchy Topping

1. Top with Ritz Crackers: Crush the Ritz crackers and sprinkle them evenly over the top of the cheese. This will create a buttery, crispy topping once baked.

Bake the Dish

1. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and the casserole is bubbling. The cheese should be melted and the sauce hot and creamy.