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The Best Creamy Tuna Noodle Casserole (From Scratch!)

A cozy bowl of homemade, baked Tuna Noodle Casserole with a crispy topping, being served for a family dinner.

A classic, from-scratch recipe for a creamy Tuna Noodle Casserole. This comfort food dish features a homemade béchamel-style sauce, enriched with milk and a splash of dry sherry, and filled with sautéed onions and mushrooms. The creamy sauce is tossed with cooked wide egg noodles, flaked white albacore tuna, and diced red bell pepper. The casserole is then topped with a crunchy layer of buttered panko breadcrumbs and baked in a 9×13-inch dish until golden brown and bubbly.

Ingredients

  • 12 ounces wide egg noodles
  • 8 tablespoons (1 stick) salted butter, divided
  • 1 medium onion, diced
  • 6 ounces white button mushrooms, finely chopped
  • 1/4 cup all-purpose flour
  • 3 cups warmed whole milk
  • 1/2 cup dry sherry
  • Kosher salt and freshly ground black pepper
  • Three 6.4-ounce cans white albacore tuna in water, drained
  • 1/4 cup finely chopped red bell pepper
  • 2 tablespoons minced fresh parsley
  • 1/2 cup panko breadcrumbs

Instructions

  1. Preheat the oven to 400°F. Butter a 9-by-13-inch baking dish.
  2. Bring a large pot of salted water to a boil and cook the egg noodles until al dente, according to package instructions. Drain and set aside.
  3. Make the Sauce: While the noodles cook, melt 4 tablespoons of butter in a large skillet over medium heat. Add the onion and cook for 3 to 4 minutes, until starting to soften. Add the mushrooms and cook for another couple of minutes.
  4. Sprinkle the flour over the vegetables and stir to coat. Cook for 1 minute to create a roux.
  5. Whisk in the warm milk and the sherry. Cook, whisking, for 3 to 4 minutes until the sauce has thickened. Season to taste with salt and pepper.
  6. Assemble the Casserole: Add the drained tuna to the sauce and stir. Then, stir in the diced bell pepper and 1 tablespoon of the parsley.
  7. Fold in the cooked noodles until they are evenly coated. Transfer the entire mixture to the prepared baking dish.
  8. Prepare the Topping and Bake: In a small bowl, melt the remaining 4 tablespoons of butter. Stir in the panko breadcrumbs and the remaining 1 tablespoon of parsley.
  9. Sprinkle the buttered breadcrumbs over the top of the casserole.
  10. Bake for 25 to 30 minutes, until the topping is golden and the casserole is hot and bubbly.
  11. Let it rest for a few minutes before serving.

Notes

  • Cooking the pasta ‘al dente’ is important as it will continue to absorb sauce and cook in the oven without becoming mushy.
  • Making a roux (cooking the flour in butter) is the classic method for thickening the creamy sauce.
  • Panko breadcrumbs are recommended for a lighter, crispier topping than traditional breadcrumbs.