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A warm Cheesy Mozzarella Chicken Casserole baking in a dish.

Classic Cheesy Mozzarella Chicken Casserole

Indulge in a classic comfort food with this cheesy mozzarella chicken casserole, featuring tender chicken in a rich marinara cream sauce, topped with melted mozzarella and Parmesan.
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Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 6 people
Calories: 450
Ingredients Equipment Method Notes

Ingredients
  

Main Ingredients
  • 2 lbs boneless, skinless chicken breasts or thighs
  • 1 tablespoon olive oil
  • 1 medium onion chopped
  • 2-3 garlic minced
  • 1 cup chicken broth low sodium preferred
  • 1/2 cup heavy cream or half-and-half for a lighter option
  • 1 cup marinara sauce your favorite brand
  • 1 teaspoon Italian seasoning
  • 1/2 teaspoon dried oregano
  • Salt & black pepper to taste
  • 2 cups shredded mozzarella cheese part-skim or whole milk both work beautifully
  • 1/2 cup grated Parmesan cheese for extra flavor
  • Fresh parsley for garnish (optional)

Equipment

  • Paper towels
  • Large skillet
  • 9x13 inch baking dish

Method
 

Instructions
  1. Pat the chicken pieces dry with paper towels and season generously with salt and pepper.
  2. Heat olive oil in a large skillet over medium-high heat. Sear the chicken for 3-4 minutes per side until lightly browned; remove and set aside.
  3. In the same skillet, cook the chopped onion until softened (3-5 minutes), then add minced garlic and cook for another minute.
  4. Pour in chicken broth, heavy cream, and marinara sauce; stir well. Add Italian seasoning and dried oregano, then simmer for 5-7 minutes until slightly thickened. Adjust seasoning as needed.
  5. Return the seared chicken to the skillet and stir to coat thoroughly with the sauce.
  6. Transfer the chicken and sauce mixture to a 9x13 inch baking dish.
  7. Evenly sprinkle shredded mozzarella and then grated Parmesan cheese over the chicken mixture.
  8. Preheat oven to 375°F (190°C) and bake for 20-25 minutes, until bubbly and golden brown.
  9. Let the casserole rest for 5-10 minutes before serving. Garnish with fresh parsley if desired.

Notes

For a richer flavor profile, consider adding a pinch of red pepper flakes to the sauce. This casserole is also great for meal prep; simply divide into portions and reheat for quick meals throughout the week.