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 Macaroni Casserole?

You need 11 ingredients. The key ingredients include: 1 c. real mayonnaise, 1 c. shredded Swiss cheese, 1/2 c. milk, 1/4 c. chopped onion, and more.

Is Tuna Macaroni Casserole suitable as seafood?

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

How do I store leftover Tuna Macaroni Casserole?

Store in an airtight container at room temperature for up to 3–5 days. For longer storage, freeze for up to 3 months — no need to refrigerate or reheat.

Tuna Macaroni Casserole Recipe

Name: Tuna Macaroni Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 c. real mayonnaise; 1 c. shredded Swiss cheese; 1/2 c. milk; 1/4 c. chopped onion; 1/4 c. chopped sweet red pepper or pimiento; 1/8 tsp. pepper; 2 (7 oz.) cans tuna, drained and flaked; 1 (10 oz.) pkg. frozen peas, thawed; 2 c. shell or elbow macaroni, cooked and drained; 2 Tbsp. corn oil margarine; 1/2 c. fine dry bread crumbs

Try this homemade Tuna Macaroni Casserole recipe the whole family will love. Made with mayonnaise, Swiss cheese, milk and onion. Easy step-by-step instr…

This Tuna Macaroni Casserole relies on simple, everyday ingredients such as real mayonnaise, shredded swiss cheese, milk and chopped onion. It comes together quickly and makes 4 servings, at about 763 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

Feel free to swap in similar ingredients you already have on hand and adjust seasoning to taste.

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

My Personal Notes

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Tuna Macaroni Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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