Making Homemade Southern Chicken Spaghetti Casserole is simple when you follow these detailed steps:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C).

2. Cook the Spaghetti: In a large pot, boil water and cook the spaghetti according to package instructions until al dente. Drain and set aside.

3. Prepare the Chicken Mixture: In a large bowl, combine the shredded chicken, cream of chicken soup, sour cream, diced bell pepper, diced onion, garlic powder, onion powder, and chicken broth. Mix well until combined.

4. Add Cooked Spaghetti: Gradually fold in the cooked spaghetti, ensuring that it is fully coated with the creamy chicken mixture.

5. Season to Taste: Add salt, pepper, and paprika if desired. Stir until all ingredients are well incorporated.

6. Transfer to Baking Dish: Pour the mixture into a greased 9×13-inch baking dish, spreading it evenly.

7. Add Cheese Topping: Sprinkle the shredded cheddar cheese evenly over the top of the casserole.

8. Breadcrumb Topping (Optional): If you prefer a crunchy topping, sprinkle breadcrumbs over the cheese.

9. Bake: Place the dish in the preheated oven and bake for 30-35 minutes or until the casserole is bubbly and the cheese is golden brown.

10. Cool Slightly: Once done, remove from the oven and let it cool for a few minutes before serving.

These steps guide you in creating an incredible casserole that will surely be a hit among family and friends.