Creamy Tuna Noodle Casserole

Featured in: Warm Family Meals

This comforting American main dish combines tender wide egg noodles and savory solid white tuna in a luscious creamy sauce enhanced with butter, garlic, and herbs. Frozen peas and optional mushrooms add subtle sweetness and texture, while cheddar cheese enriches the filling with a mild sharpness. The casserole is crowned with a crunchy layer of golden crispy fried onions and baked to bubbling perfection. Simple to prepare with pantry staples, it serves six and pairs beautifully with a crisp green salad or a glass of Chardonnay.

Updated on Fri, 21 Nov 2025 13:15:00 GMT
Creamy tuna noodle casserole with golden crispy onions, ready to serve with a bubbly, savory filling. Save to Pinterest
Creamy tuna noodle casserole with golden crispy onions, ready to serve with a bubbly, savory filling. | mellowspice.com

A comforting classic casserole featuring tender egg noodles, savory tuna, and a rich creamy sauce, all topped with golden crispy onions for irresistible crunch.

This creamy tuna noodle casserole has been a family favorite for years, bringing warmth and comfort to our dinner table every time.

Ingredients

  • Pasta: 12 oz (340 g) wide egg noodles
  • Sauce: 2 tablespoons unsalted butter 1 small yellow onion, finely chopped 2 cloves garlic, minced 3 tablespoons all purpose flour 2 cups (480 ml) whole milk 1 cup (240 ml) low sodium chicken or vegetable broth 1/2 teaspoon salt 1/2 teaspoon ground black pepper 1/2 teaspoon dried thyme 1/2 teaspoon dried parsley
  • Filling: 2 cans (5 oz/140 g each) solid white tuna in water, drained and flaked 1 cup (120 g) frozen peas, thawed 1 cup (100 g) sliced white mushrooms (optional) 1 cup (115 g) shredded cheddar cheese
  • Topping: 1 1/2 cups (75 g) store bought crispy fried onions

Instructions

Step 1:
Preheat the oven to 375°F (190°C). Lightly grease a 9x13 inch (23x33 cm) baking dish.
Step 2:
Bring a large pot of salted water to a boil. Cook egg noodles according to package directions until al dente. Drain and set aside.
Step 3:
While noodles cook, melt butter in a large skillet over medium heat. Add chopped onion and cook for 3 minutes until softened. Add garlic and cook for 1 minute.
Step 4:
Sprinkle flour over onions and stir constantly for 1 minute to cook the flour.
Step 5:
Gradually whisk in milk and broth. Cook, whisking, until the sauce thickens, about 3–4 minutes.
Step 6:
Remove from heat. Stir in sour cream, salt, pepper, thyme, and parsley.
Step 7:
Add drained tuna, peas, mushrooms (if using), and shredded cheddar cheese to the sauce. Stir until evenly combined.
Step 8:
Add cooked noodles and gently fold until everything is well mixed.
Step 9:
Transfer mixture to the prepared baking dish. Spread evenly.
Step 10:
Top with crispy fried onions.
Step 11:
Bake uncovered for 25–30 minutes, or until the casserole is bubbling and the onions are golden brown.
Step 12:
Let rest for 5 minutes before serving.
A close-up view of creamy tuna noodle casserole topped with crispy onions, bubbling inside a baking dish. Save to Pinterest
A close-up view of creamy tuna noodle casserole topped with crispy onions, bubbling inside a baking dish. | mellowspice.com

This dish always brings my family together, sharing smiles over a warm, hearty meal that tastes like home.

Notes

Pair with a crisp green salad and a glass of Chardonnay for a complete dinner experience.

Required Tools

Large pot Large skillet Whisk 9x13 inch baking dish Mixing spoon

Allergen Information

Contains wheat (noodles, flour), dairy (milk, butter, sour cream, cheese), fish (tuna), eggs (egg noodles), and possible soy (crispy onions).

Warm and inviting, this creamy tuna noodle casserole features tender noodles and a crispy onion topping. Save to Pinterest
Warm and inviting, this creamy tuna noodle casserole features tender noodles and a crispy onion topping. | mellowspice.com

Enjoy this creamy tuna noodle casserole hot and fresh for the best flavor and texture.

Recipe FAQs

What noodles work best for this dish?

Wide egg noodles hold the creamy sauce well, providing a tender base with slight chewiness ideal for this comforting dish.

Can I substitute the tuna with other proteins?

Yes, canned salmon or cooked chicken can be used as alternatives while maintaining the dish's rich texture and flavor.

How do I achieve the perfect crispy onion topping?

Use store-bought crispy fried onions and add them just before baking to ensure they remain golden and crunchy.

Is it possible to lighten the sauce?

Replacing sour cream with Greek yogurt and opting for reduced-fat cheese can reduce richness without sacrificing creaminess.

What herbs enhance the flavor of this dish?

Dried thyme and parsley add subtle herbal notes that complement the tuna and creamy sauce beautifully.

Creamy Tuna Noodle Casserole

Tender egg noodles and savory tuna in a rich creamy sauce topped with crispy onions for a warm, comforting dish.

Prep Time
20 minutes
Cook Time
30 minutes
Overall Time
50 minutes
Created by Hannah Clarke

Recipe Category Warm Family Meals

Skill Level Easy

Cuisine American

Total Yield 6 Number of Servings

Dietary Details None specified

What You Need

Pasta

01 12 ounces wide egg noodles

Sauce

01 2 tablespoons unsalted butter
02 1 small yellow onion, finely chopped
03 2 cloves garlic, minced
04 3 tablespoons all-purpose flour
05 2 cups whole milk
06 1 cup low-sodium chicken or vegetable broth
07 1/2 cup sour cream
08 1/2 teaspoon salt
09 1/2 teaspoon ground black pepper
10 1/2 teaspoon dried thyme
11 1/2 teaspoon dried parsley

Filling

01 2 cans (5 ounces each) solid white tuna in water, drained and flaked
02 1 cup frozen peas, thawed
03 1 cup sliced white mushrooms (optional)
04 1 cup shredded cheddar cheese

Topping

01 1 1/2 cups store-bought crispy fried onions

How To Make

Step 01

Prepare Oven and Dish: Preheat oven to 375°F and lightly grease a 9x13-inch baking dish.

Step 02

Cook Noodles: Bring a large pot of salted water to a boil and cook egg noodles according to package instructions until al dente. Drain and set aside.

Step 03

Sauté Aromatics: Melt butter in a large skillet over medium heat. Add chopped onion and cook until softened, about 3 minutes, then add garlic and cook for 1 more minute.

Step 04

Make Roux: Sprinkle flour over the onion and garlic mixture, stirring constantly for 1 minute to cook the flour fully.

Step 05

Prepare Sauce: Gradually whisk in whole milk and broth, cooking until the sauce thickens, approximately 3 to 4 minutes.

Step 06

Season and Combine: Remove from heat and stir in sour cream, salt, pepper, thyme, and parsley until smooth.

Step 07

Add Filling Ingredients: Incorporate drained tuna, peas, mushrooms (if using), and shredded cheddar cheese into the sauce, mixing until evenly combined.

Step 08

Combine Noodles and Sauce: Gently fold cooked noodles into the sauce mixture until fully incorporated.

Step 09

Assemble Casserole: Transfer the mixture into the prepared baking dish, spreading it evenly.

Step 10

Add Topping: Evenly sprinkle the crispy fried onions over the top of the casserole.

Step 11

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

Step 12

Rest Before Serving: Allow the casserole to rest for 5 minutes before serving.

Tools Needed

  • Large pot
  • Large skillet
  • Whisk
  • 9x13-inch baking dish
  • Mixing spoon

Allergy Details

Review all components for potential allergens and talk to your doctor with any questions.
  • Contains wheat, dairy, fish, eggs; crispy onions may contain gluten or soy. Verify packaging for allergens.

Nutrition Details (per serving)

This nutritional breakdown is for your information and isn't a substitute for health advice.
  • Total Calories: 410
  • Total Fat: 16 g
  • Carbohydrates: 43 g
  • Proteins: 25 g