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a plate loaded with cheesy chicken pasta.
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4.5 from 18 votes

Cheesy Chicken Casserole

This easy Cheesy Chicken Casserole is made with pasta, chunks of tender chicken and a rich tomato sauce all smothered in mozzarella cheese, then baked to bubbling perfection. A comforting dinner that is undeniably delicious and very easy to prepare!
Prep Time15 mins
Cook Time40 mins
Total Time55 mins
Course: Dinner
Cuisine: American, Italian
Keyword: cheesy chicken casserole, Cheesy Chicken Pasta Bake, chicken casserole
Servings: 6
Calories: 597kcal


  • 1 lb pasta any kind of pasta you have in your pantry
  • 2 tbsp olive oil
  • 1 lb chicken breasts boneless, skinless, chopped in small 1 inch pieces
  • salt and pepper to taste
  • 2 tbsp butter
  • 1 large onion chopped
  • 5 cloves garlic minced
  • 1 tsp oregano
  • 1 tsp basil
  • ½ tsp red pepper flakes
  • 1 cup chicken broth low sodium or no sodium added
  • 28 oz diced tomatoes 1 can
  • 2 cups Mozzarella cheese shredded


  • Cook The Pasta: Cook the pasta according to package instructions in a pot of boiling salted water.
  • Prep the oven: Preheat oven to 375°F.
  • Cook the Chicken: In a large skillet, heat olive oil over medium heat. Add the chicken and season chicken with salt and pepper. Cook the chicken until no longer pink, about 5 minutes.
  • Add Aromatics: Add the butter to skillet and melt. Stir in onions and cook for 3 to 5 minutes until the onion soften and become translucent. Add garlic and saute for another 30 seconds until aromatic.
  • Finish the Sauce: Season with more salt and pepper if needed, then add the oregano, basil, oregano and red pepper flakes. Stir in the chicken broth and bring to a boil, scraping all the brown bits. Add crushed tomatoes and simmer for 5 minutes.
  • Assemble the Casserole: Transfer the cooked pasta to a 9x13-inch casserole dish, pour chicken tomato sauce over the pasta and a cup of the mozzarella cheese, then toss well. Sprinkle the remaining mozzarella cheese over the top of the casserole.
  • Bake: Transfer the casserole dish the the oven and bake for about 15 to 20 minutes, just until the cheese melts and gets bubbly.



  1. To make a breadcrumb topping melt 1 tbsp of butter with ¼ cup of breadcrumbs and sprinkle over the top before baking.
  2. You can add whatever you see fit to this dish! Toss in veggies, spices or any ingredients you want to use up in your fridge.
  3. Store leftover chicken casserole in an airtight container in the fridge. It will keep for 3-5 days, just make sure it’s properly cooled before storing!


Serving: 1serving | Calories: 597kcal | Carbohydrates: 66g | Protein: 37g | Fat: 20g | Saturated Fat: 9g | Cholesterol: 88mg | Sodium: 532mg | Potassium: 806mg | Fiber: 4g | Sugar: 7g | Vitamin A: 615IU | Vitamin C: 16mg | Calcium: 262mg | Iron: 3mg