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Ultimate Cheesy Chicken Potato Broccoli Casserole: Easy One-Dish Family Dinner

This comforting casserole combines tender chicken, creamy potatoes, fresh broccoli, and melty cheese all baked to golden perfection. It's a complete one-dish meal perfect for busy families or gatherings, featuring delicious melded flavors with minimal cleanup.
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Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings: 6 servings
Calories: 480
Ingredients Method Notes

Ingredients
  

Ingredients
  • 2 lbs chicken breast, cubed
  • 4 medium potatoes, peeled and cubed
  • 2 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 grated Parmesan cheese
  • 1 tablespoon olive oil
  • 2 cloves garlic, minced
  • 1 teaspoon dried thyme
  • 1 teaspoon paprika
  • Salt and black pepper to taste
  • 1/4 cup breadcrumbs (optional, for topping)

Method
 

Instructions
  1. Start by preheating your oven to 375°F (190°C). Cube the chicken breast and potatoes into bite-sized pieces. Cut the broccoli into small florets. Having all ingredients prepped makes assembly quick and easy.
  2. Heat olive oil in a large skillet over medium heat. Add the cubed chicken and cook until browned on all sides, about 5-7 minutes. Add the minced garlic and cook for another minute. Remove the chicken from the skillet and set aside.
  3. In the same skillet, add the heavy cream, sour cream, dried thyme, paprika, salt, and pepper. Whisk together until smooth and heated through. This creamy base will coat all your ingredients beautifully.
  4. In a 9x13 inch baking dish, combine the cooked chicken, cubed potatoes, and broccoli florets. Pour the creamy sauce over everything and toss gently to coat evenly. Top with cheddar, mozzarella, and Parmesan cheeses.
  5. Sprinkle with breadcrumbs if using, then bake for 35-45 minutes, or until the potatoes are tender and the top is golden brown and bubbly. Let it rest for 5 minutes before serving.

Notes

Add diced onion or bell peppers for extra flavor. Can be assembled ahead and refrigerated for up to a day before baking. Frozen broccoli works perfectly, no need to thaw first.