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Chicken Parmesan Casserole - Cozy, Cheesy, and Weeknight-Friendly

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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 6 servings
Ingredients Method

Ingredients
  

  • 3 cups cooked chicken, shredded or chopped (rotisserie works great)
  • 3 cups marinara sauce (homemade or your favorite jarred sauce)
  • 2 cups shredded mozzarella
  • 1/2 cup grated Parmesan cheese (plus extra for topping)
  • 1 cup seasoned breadcrumbs (or crushed garlic croutons or panko)
  • 2 tablespoons olive oil (or melted butter)
  • 2 cloves garlic, minced (optional but recommended)
  • 1 teaspoon Italian seasoning (or a mix of dried basil and oregano)
  • 1/4 teaspoon red pepper flakes (optional for a little heat)
  • Salt and black pepper, to taste
  • Fresh basil or parsley, chopped, for garnish
  • Optional add-ins: 8 ounces cooked pasta, 1 cup ricotta, or sautéed spinach/mushrooms

Method
 

  1. Preheat the oven: Set to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
  2. Season the chicken: In a large bowl, toss the cooked chicken with salt, pepper, Italian seasoning, and red pepper flakes. This step boosts flavor so the casserole doesn’t taste flat.
  3. Build the base: Spread 1 cup of marinara in the bottom of the baking dish. This prevents sticking and keeps the chicken juicy.
  4. Add the chicken layer: Evenly scatter the seasoned chicken over the sauce. If using ricotta, dollop small spoonfuls across the chicken.
  5. Sauce and cheese: Pour the remaining marinara over the chicken. Sprinkle with mozzarella and half of the grated Parmesan.
  6. Make the crunchy topping: In a bowl, combine breadcrumbs with olive oil (or melted butter), minced garlic, and a pinch of salt and pepper. Stir until the crumbs are evenly moistened.
  7. Top the casserole: Scatter the breadcrumb mixture over the cheese. Add the remaining Parmesan on top for extra savoriness.
  8. Bake: Place in the oven for 20–25 minutes, until the sauce is bubbling and the top is golden. If you want more color, broil for 1–2 minutes at the end. Watch closely so the topping doesn’t burn.
  9. Rest and garnish: Let the casserole sit for 5–10 minutes to set. Sprinkle with chopped basil or parsley before serving.
  10. Serve: Enjoy on its own, over spaghetti, or with a crisp green salad and garlic bread.