Creating a delicious Broccoli Cheddar Chicken Bake is straightforward if you follow these guided steps:

1. Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish.
2. Mix Ingredients: In a large mixing bowl, combine the cooked chicken, steamed broccoli, cream of chicken soup, sour cream, cheddar cheese, garlic powder, onion powder, salt, and pepper. Stir until everything is well incorporated.
3. Transfer Mixture: Pour the chicken and broccoli mixture into the prepared baking dish, spreading it evenly.
4. Prepare Topping: In a small bowl, mix the breadcrumbs with olive oil until they are evenly coated. Sprinkle this mixture over the chicken and broccoli layer.
5. Bake: Place the dish in the preheated oven and bake for 25-30 minutes or until bubbly and golden brown on top.
6. Serve: Once cooked, remove from the oven and allow it to cool for a few minutes before serving.

Following these simple steps will help you create an irresistible Broccoli Cheddar Chicken Bake that is bound to impress!