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Ultimate Cheesy Chicken Potato Broccoli Casserole

This hearty one-dish dinner combines tender chicken, creamy potatoes, and nutritious broccoli under a blanket of melted cheese for a satisfying comfort meal that's perfect for busy weeknights. The creamy sauce brings everything together in a single baking dish for minimal cleanup and maximum flavor.
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Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings: 6 servings
Calories: 480
Ingredients Method Notes

Ingredients
  

Ingredients
  • 2 lbs boneless, skinless chicken breasts, cubed
  • 4 medium potatoes, peeled and diced
  • 3 cups broccoli florets
  • 1 cup shredded cheddar cheese
  • 1 cup shredded mozzarella cheese
  • 1 cup heavy cream
  • 1/2 cup sour cream
  • 1/4 cup butter
  • 1 medium onion, diced
  • 3 cloves garlic, minced
  • 2 tbsp all-purpose flour
  • 1 tsp paprika
  • 1 tsp dried thyme
  • Salt and pepper to taste

Method
 

Instructions
  1. Preheat oven to 375°F (190°C)
  2. In a large skillet, melt butter over medium heat. Add diced onion and cook until softened, about 3-4 minutes. Add garlic and cook for another minute until fragrant. Add chicken cubes and cook until no longer pink, approximately 5-7 minutes
  3. Sprinkle flour over the chicken mixture and stir to coat. Gradually add heavy cream while stirring constantly. Bring to a gentle simmer until the sauce thickens slightly. Stir in sour cream, paprika, thyme, salt, and pepper
  4. Add diced potatoes and broccoli florets to the skillet, stirring to coat everything in the creamy sauce. Transfer the mixture to a 9x13 inch baking dish
  5. Sprinkle both cheddar and mozzarella cheeses evenly over the top of the casserole
  6. Cover with foil and bake for 30 minutes. Remove foil and bake for another 15-20 minutes, or until potatoes are tender and cheese is golden brown. Let it rest for 5 minutes before serving

Notes

For quicker assembly, prepare components ahead - chop vegetables and chicken the night before. The creamy sauce can be made a day in advance. Customize with different vegetables or cheese combinations.