Nothing beats the cozy, comforting flavor of a well-made casserole, and this Creamy Tuna Melt Casserole Recipe delivers exactly that with every creamy, cheesy bite. It’s the perfect harmony of tender macaroni, rich cheese sauce, flaky tuna, and fresh tomato slices crowned with a hint of dill. Whether you’re looking for a family favorite or a crowd-pleaser for potlucks, this dish brings together simplicity and indulgence in a way that’s irresistibly delicious and warm. Once you try this recipe, it just might become your go-to for any occasion when you want something cozy with a touch of elegance.
Ingredients You’ll Need

Ingredients You’ll Need
These ingredients are straightforward and each one plays a crucial role in making the Creamy Tuna Melt Casserole Recipe truly sing. From the tender pasta creating the perfect base to the cheese melting into a luscious sauce, every element contributes to both texture and flavor in the most satisfying ways.
- 16 oz macaroni pasta: Cooked slightly under al dente to maintain a perfect bite even after baking.
- 1/2 cup white onion, diced: Adds subtle sweetness and depth as it softens and caramelizes in butter.
- 3 tablespoons butter: Essential for building a velvety, rich cheese sauce starting with the roux.
- 2 tablespoons flour: Gives body to the sauce by thickening it without lumps.
- 4 cups milk: Creates a creamy base that blends all flavors and makes the dish delightfully smooth.
- 1/2 teaspoon salt: Enhances all the other flavors perfectly without overpowering.
- 1/4 teaspoon ground pepper: Provides a gentle, balancing warmth.
- 1/4 teaspoon garlic powder: Adds a subtle flavor boost that complements the cheese and tuna.
- 8 slices provolone cheese: Layered on top for a mild, melty finish.
- 2 cups shredded cheddar cheese, divided: Half melted into the sauce and half sprinkled on top for sharpness and melty goodness.
- 5-6 oz white albacore tuna in water, drained and flaked: The star protein that pairs perfectly with creamy cheese.
- 2 tablespoons chopped capers: These bring a tangy, briny kick that brightens the rich flavors.
- 2-3 medium to large tomatoes, sliced: Fresh tomato slices create a juicy splash and vibrant color on top.
- 1/4 teaspoon dried dill: Sprinkled on top for a subtle herbal note that ties everything together.
How to Make Creamy Tuna Melt Casserole Recipe
Step 1: Prepare Your Baking Dish and Oven
Start by preheating your oven to a toasty 400°F. Spray a 9×13-inch baking dish with nonstick spray so the casserole won’t stick after all that gooey goodness bakes up. This sets the stage for an easy clean-up and perfect presentation.
Step 2: Sauté the Onions
In a medium skillet over medium heat, melt the butter and gently cook the diced onions until they soften and begin to brown, about 6 to 8 minutes. This step brings out their natural sweetness and adds a fantastic foundation of flavor for your cheese sauce.
Step 3: Make the Cheese Sauce
Sprinkle the flour over the softened onions and stir it constantly for about a minute to cook out the raw flour taste. Then, slowly pour in the milk while stirring to avoid lumps. Keep stirring frequently until the sauce starts bubbling and thickening. Add salt, pepper, and garlic powder to season the sauce perfectly.
Step 4: Melt the Cheddar Cheese
Remove the sauce from the heat and stir in one cup of shredded cheddar until it melts smoothly into a rich, creamy blend. This step is the secret to that luscious cheesy texture that makes this casserole stand apart.
Step 5: Combine Pasta, Tuna, and Cheese Sauce
In a large bowl, mix your al dente cooked macaroni with the flaked tuna and chopped capers. Pour the warm cheese sauce over the top and stir gently until everything is evenly coated. Transfer this mixture into your prepared baking dish to get ready for the final layering.
Step 6: Layer and Bake
Arrange the provolone slices neatly over the pasta mixture. Then add your tomato slices, followed by the remaining shredded cheddar cheese. Sprinkle dried dill on top to add that final aromatic touch. Cover the dish with foil and bake for 20 minutes, removing the foil for the last 5 minutes so the cheese on top turns golden and bubbly.
How to Serve Creamy Tuna Melt Casserole Recipe
Garnishes
A sprinkle of fresh parsley or extra chopped dill makes a lovely green contrast and lifts the dish with a burst of freshness. Thinly sliced green onions also add a mild crunch and a touch of sharpness that brightens the creamy layers below.
Side Dishes
This creamy tuna melt casserole pairs perfectly with simple, crisp side salads like a cucumber and radish salad or a tangy coleslaw. For heartier options, roasted vegetables or garlic bread complement the rich flavors beautifully, rounding out the meal without stealing the spotlight.
Creative Ways to Present
Consider serving individual portions in small ramekins for a charming, personalized touch at dinner parties. You can also layer the casserole in clear glass dishes for a pretty presentation that shows off all the cheesy layers and colorful tomato slices. For a fun twist, try topping with crispy baked breadcrumbs before baking for added texture.
Make Ahead and Storage
Storing Leftovers
Leftover casserole keeps wonderfully in the refrigerator for up to 3 days, covered tightly with foil or plastic wrap. The flavors actually deepen, making for a delicious next-day meal you’ll look forward to reheating.
Freezing
This casserole freezes well for up to 2 months. For best results, assemble but don’t bake before freezing. When ready, thaw overnight in the fridge and then bake as directed. This way, it stays fresh and creamy without becoming watery.
Reheating
Reheat individual portions in the microwave, covering loosely to retain moisture, or warm the entire casserole in the oven at 350°F until bubbly and heated through. Adding a few extra tomato slices on top before reheating can freshen the presentation and flavor.
FAQs
Can I use different types of pasta for this recipe?
Absolutely! While macaroni is traditional and holds the sauce well, you can substitute with elbow macaroni, penne, or even small shells. Just make sure to cook the pasta slightly underdone since it will bake further in the oven.
Is it necessary to drain the tuna before using it?
Yes, draining the tuna thoroughly prevents the casserole from becoming too watery and ensures the flavors stay rich and creamy. Flaking it gently also helps distribute it evenly throughout the dish.
Can I substitute the milk with a dairy-free alternative?
You can, but it’s best to choose an unsweetened, neutral-flavored alternative like almond or oat milk. Keep in mind the sauce may not be quite as rich as with dairy milk, but it will still be delicious.
What makes this a “tuna melt” casserole instead of just tuna casserole?
The combination of the creamy cheese sauce, provolone slices, and sliced tomatoes heated until melty on top mimics the iconic tuna melt sandwich flavors, but in a cozy casserole form. It’s a fun twist that adds layers of texture and flavor.
Can I add other vegetables to this casserole?
Certainly! Some sautéed mushrooms, peas, or chopped spinach would all work well and add extra nutrition and color. Just be mindful of moisture levels to keep the creamy texture intact.
Final Thoughts
Trust me when I say this Creamy Tuna Melt Casserole Recipe is a total game changer for comfort food lovers. It’s a heartfelt, cheesy, and simple meal that brings so much warmth and joy to the table. Once you make it, I hope you’ll enjoy it as much as I do and find yourself coming back to it time and time again. Happy cooking!
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Creamy Tuna Melt Casserole Recipe
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Total Time: 40 minutes
- Yield: 6 servings
- Category: Casserole
- Method: Baking
- Cuisine: American
Description
This Creamy Tuna Melt Casserole is a comforting and delicious baked pasta dish featuring al dente macaroni, a rich and cheesy white sauce, tender tuna, and fresh tomato slices. Topped with a blend of provolone and cheddar cheeses and seasoned with capers and dill, it bakes to golden perfection, making it an ideal family-friendly meal for any night of the week.
Ingredients
Pasta and Tuna Mixture
- 16 oz macaroni pasta (cooked to al dente, drained and rinsed)
- 5–6 oz white albacore tuna in water (drained and flaked)
- 2 tablespoons chopped capers
Cheese Sauce
- 3 tablespoons butter
- 1/2 cup white onion (diced)
- 2 tablespoons flour
- 4 cups milk
- 1/2 teaspoon salt
- 1/4 teaspoon ground pepper
- 1/4 teaspoon garlic powder
- 1 cup shredded cheddar cheese
Toppings
- 8 slices provolone cheese
- 1 cup shredded cheddar cheese
- 2–3 medium to large tomatoes (sliced into 1/4 inch slices)
- 1/4 teaspoon dried dill
Instructions
- Preheat and Prepare Dish: Preheat your oven to 400°F (204°C). Spray a 9×13-inch baking dish with nonstick spray and set it aside to prepare for the casserole assembly.
- Sauté Onions: Melt butter over medium heat in a medium skillet. Add the diced onions and cook until they become soft and start to brown, approximately 6-8 minutes, to develop sweetness and flavor.
- Make Cheese Sauce: Sprinkle the flour over the softened onions and cook while stirring for about one minute to cook off the raw flour taste. Slowly pour in the milk, stirring constantly to avoid lumps. Continue cooking and stirring frequently until the sauce begins to bubble and thickens slightly. Stir in salt, pepper, and garlic powder to season.
- Add Cheese to Sauce: Remove the sauce from heat and stir in 1 cup of shredded cheddar cheese until fully melted, creating a creamy cheese sauce base.
- Combine Pasta and Tuna: In a large mixing bowl, combine the cooked al dente macaroni pasta, flaked tuna, and chopped capers. Pour the warm cheese sauce over the mixture and stir thoroughly until all ingredients are well blended.
- Assemble Casserole: Transfer the pasta and cheese mixture into the prepared baking dish. Layer the 8 slices of provolone cheese evenly over the top. Arrange the tomato slices over the provolone layer, then sprinkle the remaining 1 cup of shredded cheddar cheese on top. Finally, sprinkle with dried dill to enhance aroma and flavor.
- Bake the Casserole: Cover the dish loosely with foil and bake in the preheated oven for 20 minutes. Then remove the foil and bake for an additional 5 minutes to brown the cheese topping lightly and finish melting the cheeses.
Notes
- For best results, cook the macaroni 1-2 minutes less than package directions to keep it slightly firm before baking.
- Drain and rinse the pasta after cooking to stop the cooking process and prevent it from becoming mushy.
- Adjust seasoning to taste, especially salt and pepper, to balance the flavors with the tuna and capers.
- If you prefer a thicker sauce, cook it a bit longer during the bubbling phase until desired consistency is reached.
- Use fresh tomatoes and dried dill for the best flavor contrast with the creamy sauce and cheeses.

