Tuna Noodle Casserole Crispy

Featured in: Wham-Worthy Weeknights

This comforting casserole blends tender egg noodles and savory tuna in a creamy sauce enriched with sour cream and cheddar cheese. Sautéed onions, mushrooms, and garlic add depth, while the crispy fried onion topping lends a golden crunch. Baked until bubbly and golden, it’s an easy, satisfying main dish ideal for family gatherings or weeknight meals. Variations include adding lemon juice, parsley, or alternative cheeses for extra flavor.

Updated on Thu, 20 Nov 2025 11:50:00 GMT
Golden-brown Homemade Tuna Noodle Casserole with a crispy onion topping ready to serve. Save
Golden-brown Homemade Tuna Noodle Casserole with a crispy onion topping ready to serve. | whambite.com

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

This casserole brings back warm memories of chilly evenings spent gathered around the table when everyone wanted seconds. It's a dish I prepare for easy weeknight dinners and it always disappears fast.

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

Prep and Cook Noodles:
Preheat oven to 190°C (375°F). Lightly grease a 23 x 33 cm (9 x 13 inch) baking dish. Cook egg noodles according to package directions until al dente. Drain and set aside.
Creamy Base:
In a large skillet over medium heat melt butter. Add chopped onion and mushrooms and sauté 4–5 minutes until softened. Add garlic and cook 1 minute more.
Create Sauce:
Sprinkle flour over vegetables and stir for 1 minute. Gradually whisk in milk stirring constantly. Cook until sauce thickens about 3–4 minutes. Stir in sour cream Dijon mustard salt pepper and thyme. Remove from heat.
Combine Ingredients:
Add drained tuna peas cheddar cheese and cooked noodles to the sauce. Mix gently until combined.
Assemble and Bake:
Spoon mixture into prepared baking dish. Sprinkle crispy fried onions evenly over the top. Bake uncovered for 25–30 minutes or until bubbly and golden. Let stand 5 minutes before serving.
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Everyone in my family—even picky eaters—digs into this casserole without hesitation and we always share a laugh over who claims the last bite of crispy topping.

Serving Suggestions

Serve hot straight from the oven with a fresh green salad and a dry white wine such as Sauvignon Blanc for a comforting meal that feels special.

Nutritional Information

Each serving provides about 430 calories 17 g total fat 44 g carbohydrates and 25 g protein making it a well-balanced option for dinner.

Variation Ideas

Try a splash of lemon juice or chopped parsley for brightness. Swap cheddar for Swiss or Monterey Jack cheese or add more vegetables such as bell peppers for extra color.

A warm plate of Homemade Tuna Noodle Casserole with melted cheese and crunchy fried onions. Save
A warm plate of Homemade Tuna Noodle Casserole with melted cheese and crunchy fried onions. | whambite.com

This nostalgic classic is simple to make and sure to please—perfect comfort food for sharing.

Kitchen Guide

What type of noodles works best?

Egg noodles provide the perfect balance of texture and absorb the creamy sauce well, but other short pasta like shells or rotini can also be used.

Can I substitute the tuna with another seafood?

Yes, canned salmon or cooked crab meat can be used as alternatives, offering different flavors while maintaining the protein component.

How do I achieve a crispy onion topping?

Store-bought crispy fried onions are convenient, but you can also fry thinly sliced onions until golden brown and crunchy at home.

Is it possible to make it vegetarian?

Replacing tuna with hearty vegetables like mushrooms or artichokes and ensuring vegetable-based broth or sauces are used can create a vegetarian version.

What side dishes pair well with this dish?

Fresh green salads, steamed vegetables, or a crisp white wine such as Sauvignon Blanc complement its rich and creamy profile well.

Tuna Noodle Casserole Crispy

Creamy casserole with tender noodles, savory tuna, and crunchy onion topping, perfect for cozy dinners.

Prep Duration
20 min
Cook Duration
30 min
Complete Duration
50 min
Created by Brandon Ellis


Skill Level Easy

Heritage American

Output 6 Portions

Diet Requirements None specified

What 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 0.5 cup sour cream
05 1 teaspoon Dijon mustard
06 0.5 teaspoon salt
07 0.5 teaspoon black pepper
08 0.5 teaspoon dried thyme

Cheese

01 1 cup shredded cheddar cheese

Topping

01 1 cup crispy fried onions

Method

Phase 01

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

Phase 02

Cook Noodles: Cook egg noodles according to package directions until al dente. Drain and set aside.

Phase 03

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

Phase 04

Make Sauce: Sprinkle flour over vegetables and stir for 1 minute. Gradually whisk in milk, stirring constantly. Cook for 3 to 4 minutes until sauce thickens.

Phase 05

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

Phase 06

Combine Ingredients: Add drained tuna, peas, cheddar cheese, and cooked noodles to the sauce. Gently mix until well combined.

Phase 07

Assemble Casserole: Transfer mixture to prepared baking dish.

Phase 08

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

Phase 09

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

Phase 10

Rest Before Serving: Allow to stand for 5 minutes before serving.

Kitchen Tools

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

Allergy Guide

Review ingredients carefully for potential allergens and seek professional medical guidance if unsure
  • Contains milk (butter, cheese, sour cream, milk), wheat (noodles, flour), fish (tuna), eggs (egg noodles), and possibly gluten (noodles, crispy onions).

Nutrient Breakdown (per portion)

Numbers shown are estimates only - consult healthcare providers for specific advice
  • Energy: 430
  • Fats: 17 g
  • Carbohydrates: 44 g
  • Proteins: 25 g