Name: Creamy Tuna Noodle Casserole with Mushroom and Parmesan Topping Recipe
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 1 yellow onion, finely diced (250g, about 2 cups); 8 oz mushrooms, cleaned and sliced; ½ cup frozen peas (70g); 8 oz wide egg noodles (uncooked); 12 oz chunk light tuna, drained; 4 Tbsp butter, divided; 2 cups whole milk; 4 oz cream cheese; 2 Tbsp Parmesan cheese, grated (20g); 1 tsp salt, divided; ¼ tsp black pepper, freshly cracked; 2 Tbsp all-purpose flour (20g); 1 cup vegetable or chicken broth; 2 Tbsp breadcrumbs (25g)

Print Recipe· 4.3 from 2 reviews

If you’re craving a comforting, hearty dish that feels like a warm hug on a plate, look no further than this Creamy Tuna Noodle Casserole with Mushroom and Parmesan Topping Recipe. It’s a timeless classic that combines tender egg noodles, savory tuna, and a luxuriously creamy sauce enhanced by earthy mushrooms and a crispy, cheesy Parmesan breadcrumb crust. Whether you’re feeding a family or want leftovers that taste even better the next day, this recipe hits all the right notes in taste, texture, and satisfaction.

Ingredients You’ll Need

A white marbled surface holds several ingredients arranged neatly in small clear glass bowls and containers. At the center top is a large white bowl filled with uncooked curly egg noodles in a pale yellow color. To its right is a clear plastic package with whole white mushrooms. Below the noodles, there are two small glass bowls: one with bright green peas and the other with light brown breadcrumbs. To the left, a small glass bowl contains white flour, and next to it is a medium-sized yellow onion. Above the onion, a small clear bowl holds salt and black pepper. Nearby, a round can of chunk light tuna in water has a blue label, and next to it is a small stick of butter with markings. Above the butter, a small bowl of grated Parmesan cheese sits close to a bowl of cream cheese. On the left side, a small glass pitcher contains white milk, and next to it, a small glass bowl holds light yellow chicken broth. The whole scene is bright and clean with a white marbled texture under everything. photo taken with an iphone --ar 4:5 --v 7

Nothing about these ingredients is complicated, but each one plays a crucial role in building the flavor and texture of this dish, from the sweetness of onions to the rich creaminess delivered by cream cheese and milk.

Yellow onion: Finely diced for a natural sweetness and fragrant base to the casserole.
Mushrooms: Sliced and sautéed to bring an earthy depth and tender bite.
Frozen peas: Added for a pop of sweetness and vibrant color contrast.
Wide egg noodles: The perfect chewy pasta that soaks up all the creamy sauce.
Chunk light tuna: Drained to keep the casserole moist but not soggy, offering a flaky texture.
Butter: Divided to enrich both sauce and topping with a silky, golden finish.
Salt and black pepper: Essential seasoning that balances and enhances every layer of flavor.
All-purpose flour: For thickening the creamy sauce to the perfect consistency.
Whole milk: Creates a velvety sauce that binds the casserole together.
Vegetable or chicken broth: Adds subtle savory depth to the sauce.
Cream cheese: The secret ingredient that amps up the creaminess and tang.
Breadcrumbs: Mixed with butter for a crunchy, golden topping that contrasts the tender casserole.
Parmesan cheese: Grated for a nutty, flavorful crust that melts into the breadcrumbs.

How to Make Creamy Tuna Noodle Casserole with Mushroom and Parmesan Topping Recipe

Step 1: Sauté Onion and Mushrooms

Start by finely dicing the onion and sauté it in 1 tablespoon of butter over medium heat until it softens and turns translucent, which should take about 3 to 5 minutes. Then, slice the mushrooms and add them along with a pinch of salt and pepper. Keep sautéing until the mushrooms release their moisture and become tender, roughly another 5 minutes. This step builds a deeply flavorful base that infuses the casserole with richness and earthiness.

Step 2: Make the Creamy Sauce

Remove the cooked onions and mushrooms from the skillet and set aside. To that same skillet, add 2 tablespoons of butter and whisk in the flour. Keep whisking for about a minute as it bubbles—this creates a roux that will thicken your sauce beautifully. Slowly pour in the milk, broth, and cream cheese, whisking continuously to combine everything into a smooth, luscious sauce. Keep it over medium heat, patiently stirring until the sauce thickens and begins to simmer. This creamy foundation is the heart of your casserole’s indulgence.

Step 3: Combine Sauce with Vegetables and Tuna

Stir the frozen peas back into the sauce along with the sautéed onions and mushrooms. Season the mixture with the remaining salt for balanced flavor. Lastly, gently fold in the chunk light tuna to preserve its flaky texture without breaking it up too much. This creamy mixture will coat every noodle perfectly, ensuring each bite is packed with flavor.

Step 4: Cook the Noodles

While the sauce simmers, bring a large pot of water to boil. Add the wide egg noodles and cook them for about 7 minutes or until just tender. Drain well to avoid sogginess. These noodles serve as the sturdy yet tender base that carries the sauce and toppings perfectly.

Step 5: Prepare the Parmesan Mushroom Topping

In a small skillet or saucepan, melt the remaining 1 tablespoon of butter. Stir in the breadcrumbs and grated Parmesan cheese until well coated. This topping will bake to a golden, crispy layer that adds a delicious crunchy contrast to the creamy casserole beneath it.

Step 6: Assemble and Bake

Combine the cooked noodles with the creamy tuna and vegetable sauce in a large bowl. Transfer the mixture into a 9×9-inch casserole dish, spreading it out evenly. Sprinkle the prepared breadcrumb and Parmesan topping over the surface. Bake at 350ºF for about 25 minutes until the topping turns golden brown and the casserole is thoroughly heated. Then serve it steaming hot and be ready for compliments!

How to Serve Creamy Tuna Noodle Casserole with Mushroom and Parmesan Topping Recipe

In a silver pan on a white marbled surface, there are three main sections filled with different foods. On the right side, there is a large portion of cooked, yellow curly egg noodles with a soft texture. On the left side, there are pieces of light brown tuna that look soft and flaky. Beneath the tuna and spread throughout the left side is a creamy white sauce with small green peas visible inside. The pan has a shiny, silver handle that points to the left side of the image. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

Fresh herbs like chopped parsley or thyme add a burst of color and a fresh aroma that brightens the rich casserole. A light squeeze of lemon juice can also elevate the flavors by adding a subtle zing that cuts through the creaminess beautifully.

Side Dishes

Pair this casserole with a crisp green salad tossed with vinaigrette to provide a refreshing contrast. Lightly roasted or steamed vegetables such as green beans or asparagus also complement the dish without overwhelming its rich flavors.

Creative Ways to Present

Serve individual portions in small ramekins for a charming, rustic presentation perfect for dinner guests. Alternatively, layering the casserole in a clear glass dish offers a stunning view of the creamy noodles and vegetables topped with the golden crust, inviting hungry hands to dig right in.

Make Ahead and Storage

Storing Leftovers

Once cooled, transfer any leftovers into an airtight container and store them in the refrigerator. The flavors meld even more after sitting overnight, making for delicious next-day meals.

Freezing

This casserole freezes very well. Just cover it tightly with foil or plastic wrap, and place it in the freezer for up to 2 months. It’s perfect for meal prepping or saving for a day when you want comfort food in a flash.

Reheating

To reheat, thaw overnight in the fridge if frozen. Warm it in the oven at 350ºF for about 20 minutes or until bubbly and heated through. If you’re in a hurry, the microwave works well too—just cover and heat in short bursts to maintain the casserole’s creamy texture.

FAQs

Can I use canned tuna for this casserole?

Absolutely! Chunk light tuna in a can works perfectly. Just be sure to drain it well before adding to avoid excess moisture in your casserole.

Is there a substitute for cream cheese?

You can swap cream cheese with sour cream or Greek yogurt for a tangy twist, although the texture might be slightly less rich but still wonderfully creamy.

What if I’m allergic to dairy?

Try using dairy-free butter alternatives and almond or oat milk along with a dairy-free cream cheese substitute to recreate a similar creamy sauce without traditional dairy ingredients.

Can I add other vegetables?

Sure! Feel free to toss in diced carrots, bell peppers, or even spinach to boost nutrition and add more color to your Creamy Tuna Noodle Casserole with Mushroom and Parmesan Topping Recipe.

How do I make this casserole gluten-free?

Simply use gluten-free noodles and substitute regular flour with gluten-free all-purpose flour or cornstarch in the sauce. Also, opt for gluten-free breadcrumbs for the topping to keep it safe and delicious.

Final Thoughts

There is something truly magical about this Creamy Tuna Noodle Casserole with Mushroom and Parmesan Topping Recipe that makes it a perennial favorite in so many homes. It’s easy to prepare, irresistibly satisfying, and perfect for any occasion—whether a cozy family dinner or a hearty lunch the next day. Give it a try and let it become one of your go-to comfort foods that you and your loved ones will treasure again and again.