How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Spaghetti-Chicken Casserole?

You need 10 ingredients. The key ingredients include: 1 (8 oz.) box spaghetti, 1 onion, cut fine, 2 Tbsp. oil, 2 1/2 c. canned tomatoes, and more.

Is Spaghetti-Chicken Casserole suitable as pasta & noodles?

Yes, Spaghetti-Chicken Casserole falls under the Pasta & Noodles category and is a great choice for this type of meal.

How do I store leftover Spaghetti-Chicken Casserole?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Spaghetti-Chicken Casserole Recipe

Name: Spaghetti-Chicken Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 (8 oz.) box spaghetti; 1 onion, cut fine; 2 Tbsp. oil; 2 1/2 c. canned tomatoes; salt and pepper to taste; 1 Tbsp. sugar; dash of red pepper; 1/2 to 1 c. diced cooked chicken; 1 c. mushrooms; grated Cheddar cheese

Try this homemade Spaghetti-Chicken Casserole recipe the whole family will love. Made with onion, oil, tomatoes and salt. Easy step-by-step instructions…

This Spaghetti-Chicken Casserole relies on simple, everyday ingredients such as (8 oz.) box spaghetti, onion, cut fine, oil and canned tomatoes. It comes together quickly and makes 4 servings, at about 152 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Pasta & Noodles

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Brown sugar instead of white sugar adds a deeper, more caramel-like flavor.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Spaghetti-Chicken Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions