Follow these simple steps to create this incredible Chicken à la King:

1. Cook Chicken: In a large skillet, melt butter over medium heat. Add the cubed chicken, cooking until it is no longer pink, about 5-7 minutes.
2. Sauté Vegetables: Add the chopped onion, bell peppers, and mushrooms to the skillet. Sauté for another 5 minutes until the vegetables have softened.
3. Make the Roux: Sprinkle the all-purpose flour over the chicken and vegetables. Stir to coat evenly and cook for an additional 2 minutes to eliminate raw flour taste.
4. Add Broth: Gradually pour in the chicken broth while stirring continuously until well combined. Cook for another 5 minutes, allowing the sauce to thicken.
5. Add Cream: Pour in the heavy cream, stirring to incorporate into the sauce. Bring to a gentle simmer.
6. Flavor: Add garlic powder, paprika, salt, and pepper to taste. Stir everything together and let simmer for an additional 5 minutes until thick and creamy.
7. Garnish: If desired, sprinkle fresh chopped parsley over the top.
8. Serve: Remove from heat and get ready to serve your delicious Chicken à la King!

These instructions will guide you through creating a delectable dish that can be enjoyed by all.