Tuna Casserole Recipe Without Soup: Creamy Baked Goodness From Scratch

I’ve perfected this baked tuna casserole by creating a rich, creamy sauce from scratch instead of relying on canned soup. The result is a more authentic, flavorful dish that still keeps the comfort food appeal.

This recipe delivers on the promise of creamy goodness with a velvety cheese sauce that coats every noodle and piece of tuna perfectly.

Ingredients for Tuna Casserole Recipe Without Soup

From-scratch ingredients build that velvety cheese sauce every noodle deserves to swim in.

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The cheese is non-negotiable here. Sharp cheddar from a block melts smoothly without the anti-caking agents in pre-shredded. Parmesan at the deli counter has better flavor than the shelf-stable kind. Whole milk is key—2% or skim won’t give you that luscious texture. For the tuna, wild-caught in water (not oil) keeps the flavor clean. Most supermarkets carry Bumble Bee or Starkist brands.

No cheddar? Monterey Jack at a 1:1 swap works well. Out of Parmesan? Pecorino Romano has a sharper bite—use slightly less. Fresh tuna is overkill here, but if you’ve got leftover cooked salmon, flake it in for a different twist. For a gluten-free version, rice flour and gluten-free pasta do the trick. The mustard can be yellow in a pinch, but Dijon’s depth is worth hunting for.

Assemble and bake immediately for best texture, but you can prep components ahead. Cooked noodles keep in the fridge for 1 day, sauce for 2 days. Leftovers reheat well—store in the fridge for up to 4 days or freeze for 2 months.

Step-by-Step Instructions for Tuna Casserole Without Soup

This method ensures a rich, creamy texture and perfectly baked topping every time.

Step 1: Cook Egg Noodles and Prepare Filling

Bring a large pot of salted water to a rolling boil. Add the 8 oz Egg Noodles and cook according to package directions until al dente—about 7-8 minutes. Drain thoroughly and set aside. Meanwhile, drain and flake the 2 cans Canned Tuna into a large bowl.

Finely dice the 1 whole Yellow Onion and chop the 2 pieces Celery Stalks. Add these to the bowl with the tuna. Mince the 2 cloves Garlic Cloves and stir them in as well. This combination provides a flavorful base that balances the richness of the cheese sauce.

Step 2: Make the Creamy Cheese Sauce

In a large saucepan, melt the 4 tbsp Unsalted Butter over medium heat. Once foamy, whisk in the 0.25 cup All-Purpose Flour to form a smooth roux. Cook for 1-2 minutes until the mixture turns light golden brown—this removes the raw flour taste.

Gradually pour in the 2 cups Whole Milk, whisking constantly to prevent lumps. Bring to a gentle simmer and cook for 3-4 minutes until the sauce thickens enough to coat the back of a spoon. Stir in the 1 tbsp Dijon Mustard, 0.5 tsp Dried Thyme, 1 tsp Salt, and 0.5 tsp Black Pepper.

Reduce heat to low and add the 2 cups Sharp Cheddar Cheese and 0.5 cup Parmesan Cheese, stirring until fully melted and smooth. The sauce should be velvety and rich, with no stringy cheese strands.

Step 3: Combine All Elements

Add the cooked egg noodles and tuna mixture to the cheese sauce. Fold everything together gently but thoroughly, ensuring the noodles are completely coated. The sauce should cling to every strand without being soupy—if it seems too thick, add a splash of milk.

Taste and adjust seasoning if needed. The Dijon mustard should provide a subtle tang that cuts through the richness, while the thyme adds an earthy depth. Transfer the mixture to a greased 9×13-inch baking dish or similar oven-safe dish.

Step 4: Add Topping and Bake

Sprinkle the 0.5 cup Breadcrumbs evenly over the top of the casserole, pressing down lightly so they adhere. This will create a crispy, golden crust during baking. For extra richness, you can drizzle a little melted butter over the breadcrumbs.

Bake in a preheated 375°F oven for 20-25 minutes until the top is golden brown and the edges are bubbling. Let it rest for 5 minutes before serving—the sauce will thicken slightly as it cools, making it easier to portion.

Essential Equipment for This Dish

Saucepan for Sauce

A heavy-bottomed 3-quart saucepan is essential for making the roux and cheese sauce without burning. I recommend All-Clad Stainless Steel for even heat distribution. The heavy base prevents hot spots that could scorch your milk. 🔥

Whisk for Smooth Sauce

Use a balloon whisk to create your roux and incorporate the milk smoothly. The curved shape helps reach the pan’s edges. I prefer OXO’s 11-inch whisk—it’s sturdy and comfortable for constant stirring during the 3-4 minutes of sauce thickening.

Mixing Bowl for Tuna

A large stainless steel mixing bowl (at least 4 quarts) gives you plenty of room to combine tuna, vegetables, and noodles. Look for one with a non-slip base like Winco’s professional series. The weight helps keep it steady while folding everything together.

Baking Dish

Use a 9×13-inch baking dish with 2-inch sides for proper baking. I love my Le Creuset stoneware—it retains heat beautifully and goes straight from oven to table. The light color helps monitor the breadcrumb topping as it browns during the 20-25 minutes in the oven.

Box Grater for Cheese

Freshly grated cheese melts better than pre-shredded. A box grater gives you control over texture. The Cuisinox 4-sided grater is my go-to—it has dedicated sides for both cheddar and Parmesan. The fine holes create a melt that blends seamlessly into your sauce.

Wooden Spoon for Folding

A sturdy wooden spoon won’t scratch your cookware while folding the noodles into the sauce. I keep a 12-inch olive wood spoon from a local artisan just for casseroles. The flat edge helps press the mixture evenly into your baking dish. 💛

Frequently Asked Questions