Creamy Tuna Noodle Casserole

Featured in: Comfort Classics

This classic dish features tender egg noodles combined with savory tuna and a rich, creamy sauce made from butter, milk, and seasonings. Mixed with garden peas and optional mushrooms, it is finished with a crispy golden onion topping that adds irresistible texture. Baked to bubbly perfection, this meal offers a harmonious blend of flavors and comforting warmth, perfect for easy family dinners.

Updated on Fri, 21 Nov 2025 14:37:00 GMT
Creamy tuna noodle casserole with golden, bubbly edges, topped with crispy fried onions ready to serve. Save to Pinterest
Creamy tuna noodle casserole with golden, bubbly edges, topped with crispy fried onions ready to serve. | velvetthyme.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 favorite in my family for years especially during cozy weeknights when comfort food is a must.

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 34 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 2530 minutes or until the casserole is bubbling and the onions are golden brown.
Step 12:
Let rest for 5 minutes before serving.
Save to Pinterest
| velvetthyme.com

Sharing this dish with my family brings back cherished memories of comfort and warmth around the dinner table.

Notes

For a lighter version use Greek yogurt instead of sour cream and reduced-fat cheese Add a pinch of cayenne pepper or a dash of hot sauce for a kick Pair with a crisp green salad and a glass of Chardonnay.

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) Possible soy (crispy onions) Always verify labels if you have allergies or sensitivities.

A warm, comforting photo of creamy tuna noodle casserole, showcasing its tender pasta and savory filling. Save to Pinterest
A warm, comforting photo of creamy tuna noodle casserole, showcasing its tender pasta and savory filling. | velvetthyme.com

This creamy tuna noodle casserole is the perfect comfort meal you'll keep coming back to season after season.

Recipe FAQs

Can I substitute the tuna with another protein?

Yes, you can use canned salmon or cooked chicken as alternatives to tuna for varied flavors.

What makes the onion topping crispy?

The topping uses store-bought crispy fried onions which add a crunchy, golden finish when baked.

Can I make this dish lighter?

For a lighter version, substitute sour cream with Greek yogurt and use reduced-fat cheese.

How do I ensure the noodles are cooked properly?

Cook the egg noodles in boiling salted water until al dente, then drain before mixing into the sauce.

Is this dish suitable for pescatarians?

Yes, using tuna and dairy ingredients aligns this dish with a pescatarian diet.

Creamy Tuna Noodle Casserole

Comforting egg noodles with tuna, creamy sauce, and crispy golden onions for a savory main dish.

Prep time
20 min
Time for cooking
30 min
Total process time
50 min
Created by Velvet Thyme Eleanor Hayes

Recipe category Comfort Classics

Skill level Easy

Cuisine type American

Yield amount 6 Number of servings

Dietary details None specified

List of ingredients

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 it

Step 01

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

Step 02

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

Step 03

Cook aromatics: Melt butter in a large skillet over medium heat. Add onion and cook for 3 minutes until softened. Add garlic and cook for 1 minute.

Step 04

Make roux: Sprinkle flour over onion mixture and stir constantly for 1 minute to cook the flour.

Step 05

Prepare sauce: Gradually whisk in milk and broth. Cook, whisking until sauce thickens, approximately 3 to 4 minutes.

Step 06

Season sauce: Remove from heat. Stir in sour cream, salt, pepper, thyme, and parsley.

Step 07

Combine filling: Add drained tuna, peas, mushrooms if using, and shredded cheddar cheese to the sauce. Stir to combine evenly.

Step 08

Mix with noodles: Fold in cooked noodles gently until fully incorporated.

Step 09

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

Step 10

Add topping: Sprinkle crispy fried onions evenly over the surface.

Step 11

Bake: Bake uncovered for 25 to 30 minutes, until bubbling and onions turn golden brown.

Step 12

Rest before serving: Let stand for 5 minutes before serving.

Essential tools

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

Allergy warnings

Be sure to carefully review every ingredient for allergens and seek expert advice as needed.
  • Contains wheat (noodles, flour), dairy (milk, butter, sour cream, cheese), fish (tuna), and eggs (egg noodles).
  • Crispy onions may contain gluten and soy; verify packaging for allergens.

Nutrition details per serving

Details here are meant for guidance. Please contact health professionals for medical advice.
  • Calorie count: 410
  • Fat content: 16 g
  • Carbohydrate: 43 g
  • Protein amount: 25 g