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 Tuna Casserole?

You need 10 ingredients. The key ingredients include: 1/4 lb. medium noodles (2 c.), 2 medium onions, minced, 2 Tbsp. butter or oleo, 1 (20 oz.) can tomatoes, and more.

Is Tuna Casserole suitable as seafood?

Yes, Tuna Casserole falls under the Seafood category and is a great choice for this type of meal.

How do I store leftover Tuna Casserole?

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

Tuna Casserole Recipe

Name: Tuna Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1/4 lb. medium noodles (2 c.); 2 medium onions, minced; 2 Tbsp. butter or oleo; 1 (20 oz.) can tomatoes; 1/4 tsp. garlic salt; 1 tsp. salt; 1/4 tsp. pepper; 1/4 c. snipped parsley; 1 (7 oz.) can chunk-style tuna; 1/2 lb. cheese slices

Try this homemade Tuna Casserole recipe the whole family will love. Made with noodles, onions, butter and tomatoes. Easy step-by-step instructions inclu…

This Tuna Casserole relies on simple, everyday ingredients such as medium noodles (2 c.), medium onions, minced, butter or oleo and (20 oz.) can tomatoes. It comes together quickly and makes 4 servings, at about 439 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 Seafood

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

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.

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

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Tuna Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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