Homemade Tuna Noodle Casserole

Featured in: Comfort Food Favorites

This comforting casserole combines tender egg noodles with savory tuna and vibrant peas, all coated in a creamy, rich sauce enhanced by sour cream and Dijon mustard. Sautéed onions, mushrooms, and garlic build deep flavor, while shredded cheddar adds richness. The dish is baked until bubbly and topped with golden crispy fried onions for a satisfying crunch. Perfect for easy, hearty meals that bring warmth and flavor to any table.

Updated on Thu, 20 Nov 2025 08:12:00 GMT
Golden baked Homemade Tuna Noodle Casserole, topped with crispy onions, ready to serve with family. Save It
Golden baked Homemade Tuna Noodle Casserole, topped with crispy onions, ready to serve with family. | zetluna.com

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

Growing up, tuna noodle casserole was my mom's go-to for busy nights. I loved how the whole house smelled warm and savory as it baked. It was the dish we always gathered around with seconds and laughter.

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

Preheat and prepare:
Preheat oven to 190°C (375°F). Lightly grease a 23 x 33 cm (9 x 13 inch) baking dish.
Cook pasta:
Cook egg noodles according to package directions until al dente. Drain and set aside.
Prepare vegetables:
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.
Make sauce:
Sprinkle flour over vegetables and stir for 1 minute. Gradually whisk in milk, stirring constantly. Cook until sauce thickens, about 3–4 minutes.
Finish sauce:
Stir in sour cream, Dijon mustard, salt, pepper, and thyme. Remove from heat.
Combine:
Add drained tuna, peas, cheddar cheese, and cooked noodles to the sauce. Mix gently until combined.
Assemble casserole:
Spoon mixture into prepared baking dish.
Add topping:
Sprinkle crispy fried onions evenly over the top.
Bake:
Bake uncovered for 25–30 minutes, or until bubbly and golden.
Rest and serve:
Let stand 5 minutes before serving.
Creamy Homemade Tuna Noodle Casserole with a bubbling cheese layer and crunchy onion topping. Save It
Creamy Homemade Tuna Noodle Casserole with a bubbling cheese layer and crunchy onion topping. | zetluna.com

This casserole always brings back the memory of my family rushing to the table, eager for the first cheesy bite after a chilly day.

Required Tools

You'll need a large pot, large skillet, whisk, 23 x 33 cm baking dish, and mixing utensils for easy preparation.

Nutrition Information

Each serving provides approximately 430 calories, 17 g total fat, 44 g carbohydrates, and 25 g protein.

Serving Suggestions

Serve with a crisp green salad and a glass of dry white wine like Sauvignon Blanc for a complete meal.

A close-up of a steaming, family-favorite Homemade Tuna Noodle Casserole with delicious texture. Save It
A close-up of a steaming, family-favorite Homemade Tuna Noodle Casserole with delicious texture. | zetluna.com

This comforting casserole is both nostalgic and satisfying, sure to bring warmth to your table. Enjoy leftovers the next day for an easy meal!

Common Questions About Recipes

Can I use fresh onions instead of crispy fried ones?

Fresh onions can be sautéed and layered on top before baking, but they won't provide the same crunchy texture as crispy fried onions.

Is it possible to substitute sour cream with another ingredient?

Greek yogurt can replace sour cream to maintain creaminess while adding a slight tang to the sauce.

Can other cheeses be used in this dish?

Yes, Swiss or Monterey Jack cheese work well and add unique flavors and textures to the casserole.

How do I prevent the noodles from becoming mushy?

Cook the egg noodles until just al dente, then drain and set aside before mixing to keep them firm after baking.

What sides pair well with this creamy casserole?

A crisp green salad and a dry white wine like Sauvignon Blanc complement the creamy and savory elements perfectly.

Can I add vegetables to increase the nutrient content?

Adding peas is recommended, and optional mushrooms can be included for extra texture and flavor.

Homemade Tuna Noodle Casserole

Comforting dish combining tender noodles, savory tuna, and a crunchy onion topping for cozy family 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

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

Step 02

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

Step 03

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

Step 04

Create sauce base: Sprinkle flour over vegetables and cook, stirring, for 1 minute. Gradually whisk in milk and cook until the sauce thickens, about 3 to 4 minutes.

Step 05

Season sauce: Remove from heat and stir in sour cream, Dijon mustard, salt, pepper, and thyme.

Step 06

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

Step 07

Assemble casserole: Transfer the mixture into the prepared baking dish and evenly sprinkle crispy fried onions on top.

Step 08

Bake: Bake uncovered for 25 to 30 minutes, until bubbly and golden on top.

Step 09

Rest and serve: Allow casserole to rest for 5 minutes before serving.

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, wheat, fish, eggs, and possibly gluten.

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