Homemade Tuna Noodle Casserole

Featured in: Comfort Food Favorites

This comforting dish combines tender egg noodles and savory tuna in a rich, creamy sauce flavored with sautéed onions, mushrooms, garlic, and a blend of seasonings. It's finished with a golden, crispy fried onion topping baked until bubbly and inviting. Ideal for sharing with family or enjoying on a cozy night in, it brings classic flavors and easy preparation together in one satisfying meal.

Updated on Sat, 22 Nov 2025 14:53:00 GMT
Golden, bubbly homemade tuna noodle casserole with crispy onion topping, ready to serve and enjoy. Save It
Golden, bubbly homemade tuna noodle casserole with crispy onion topping, ready to serve and enjoy. | zetluna.com

A comforting, creamy classic featuring tender noodles, savory tuna, and a golden, crunchy onion topping — perfect for family dinners or cozy gatherings.

This homemade tuna noodle casserole quickly became a family favorite thanks to its comforting flavors and easy preparation.

Ingredients

  • Pasta: 340 g (12 oz) egg noodles
  • Seafood: 2 cans (each 170 g/6 oz) tuna in water, drained
  • Vegetables: 1 cup frozen peas, thawed, 1 small onion, finely chopped, 2 cloves garlic, minced, 1 cup sliced button mushrooms (optional)
  • Sauce: 2 tablespoons unsalted butter, 2 tablespoons all-purpose flour, 2 cups whole milk, 120 ml (½ cup) sour cream, 1 teaspoon Dijon mustard, ½ teaspoon salt, ½ teaspoon black pepper, ½ teaspoon dried thyme
  • Cheese: 1 cup (about 100 g) shredded cheddar cheese
  • Topping: 1 cup crispy fried onions (store-bought or homemade)

Instructions

Step 1:
Preheat oven to 190°C (375°F). Lightly grease a 23 x 33 cm (9 x 13 inch) baking dish.
Step 2:
Cook egg noodles according to package directions until al dente. Drain and set aside.
Step 3:
In a large skillet over medium heat, melt butter. Add chopped onion and mushrooms sauté 4 5 minutes until softened. Add garlic and cook 1 minute more.
Step 4:
Sprinkle flour over vegetables and stir for 1 minute. Gradually whisk in milk, stirring constantly. Cook until sauce thickens, about 3 4 minutes.
Step 5:
Stir in sour cream, Dijon mustard, salt, pepper, and thyme. Remove from heat.
Step 6:
Add drained tuna, peas, cheddar cheese, and cooked noodles to the sauce. Mix gently until combined.
Step 7:
Spoon mixture into prepared baking dish.
Step 8:
Sprinkle crispy fried onions evenly over the top.
Step 9:
Bake uncovered for 25 30 minutes, or until bubbly and golden.
Step 10:
Let stand 5 minutes before serving.
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| zetluna.com

This recipe has brought many family dinners together, creating warm memories over hearty, delicious meals.

Serving Suggestions

Serve this casserole with a fresh green salad and a crisp white wine such as Sauvignon Blanc for a complete meal.

Storage Tips

Leftovers can be cooled, covered, and refrigerated for up to 3 days or frozen for up to 2 months. Reheat thoroughly before serving.

Variations

Try substituting Greek yogurt for sour cream or using Swiss or Monterey Jack cheese for a different flavor profile.

A creamy, savory homemade tuna noodle casserole is topped with a generous layer of crispy fried onions. Save It
A creamy, savory homemade tuna noodle casserole is topped with a generous layer of crispy fried onions. | zetluna.com

Enjoy this comforting dish as a cozy weeknight dinner or a crowd-pleasing potluck favorite.

Common Questions About Recipes

What noodles work best in this dish?

Egg noodles are preferred for their texture and ability to hold the creamy sauce well.

Can I use fresh onions instead of crispy fried ones?

Fresh onions can be sautéed and mixed in, but the crispy fried onion topping adds a unique crunch and flavor contrast.

Is it possible to add vegetables to this dish?

Yes, peas and mushrooms are great additions, providing freshness and depth to the creamy mixture.

How can I make the sauce thicker?

Cooking the flour with butter before adding milk and stirring constantly will help thicken the sauce to a creamy consistency.

What cheese complements this casserole best?

Cheddar cheese is used for its sharp flavor and melting qualities, but Swiss or Monterey Jack can offer nice variations.

Homemade Tuna Noodle Casserole

Creamy tuna with tender noodles and a crunchy onion topping for satisfying dinners.

Prep Time
20 mins
Time to Cook
30 mins
Overall Time
50 mins
Authored by Clara


Skill Level Required Easy

Cuisine Type American

Recipe Output 6 Number of Portions

Dietary Needs None specified

The Ingredients You'll Need

Pasta

01 12 oz egg noodles

Seafood

01 2 cans (6 oz each) tuna in water, drained

Vegetables

01 1 cup frozen peas, thawed
02 1 small onion, finely chopped
03 2 cloves garlic, minced
04 1 cup sliced button mushrooms, optional

Sauce

01 2 tablespoons unsalted butter
02 2 tablespoons all-purpose flour
03 2 cups whole milk
04 ½ cup sour cream
05 1 teaspoon Dijon mustard
06 ½ teaspoon salt
07 ½ teaspoon black pepper
08 ½ teaspoon dried thyme

Cheese

01 1 cup shredded cheddar cheese

Topping

01 1 cup crispy fried onions

Step-by-Step Instructions

Step 01

Prepare oven and baking dish: Preheat oven to 375°F. Lightly grease a 9 x 13 inch baking dish.

Step 02

Cook noodles: Boil egg noodles according to package instructions until al dente. Drain and set aside.

Step 03

Sauté vegetables: Melt butter in a large skillet over medium heat. Add chopped onion and mushrooms, sauté for 4 to 5 minutes until softened. Add garlic and cook for 1 minute.

Step 04

Create sauce base: Sprinkle flour over the sautéed vegetables and stir for 1 minute. Gradually whisk in milk while stirring constantly. Cook for 3 to 4 minutes until the sauce thickens.

Step 05

Add seasonings and dairy: Remove skillet from heat. Stir in sour cream, Dijon mustard, salt, black pepper, and dried thyme until well incorporated.

Step 06

Combine main ingredients: Mix drained tuna, thawed peas, shredded cheddar, and cooked noodles into the sauce gently until evenly combined.

Step 07

Assemble casserole: Transfer mixture evenly into the prepared baking dish.

Step 08

Add crispy topping: Evenly sprinkle crispy fried onions over the casserole surface.

Step 09

Bake until golden: Bake uncovered for 25 to 30 minutes, or until the casserole is bubbly and the topping is golden brown.

Step 10

Rest before serving: Let the casserole stand for 5 minutes before serving to allow it to set.

Tools You'll Need

  • Large pot
  • Large skillet
  • Whisk
  • 9 x 13 inch baking dish
  • Mixing utensils

Allergy Information

Review each ingredient to identify allergens and consult an expert if needed.
  • Contains milk (butter, cheese, milk, sour cream), wheat (noodles, flour), fish (tuna), and eggs (egg noodles).
  • May contain gluten from noodles and crispy onions; verify packaging for allergen information.

Nutritional Facts (Per Serving)

Keep in mind these details are for general guidance and shouldn't replace professional advice.
  • Caloric Content: 430
  • Fats: 17 grams
  • Carbohydrates: 44 grams
  • Proteins: 25 grams