Tuna Casserole Baked Pasta (Printable)

Hearty baked pasta with tender noodles, flaky tuna, peas, creamy sauce, and a crunchy breadcrumb top.

# What You Need:

→ Pasta

01 - 9 oz egg noodles or fusilli

→ Vegetables

02 - 1 cup frozen peas
03 - 1 small onion, finely chopped
04 - 2 cloves garlic, minced

→ Tuna

05 - 2 cans (6 oz each) tuna in water, drained

→ Sauce

06 - 2 tablespoons unsalted butter
07 - 2 tablespoons all-purpose flour
08 - 1 1/2 cups milk
09 - 1/2 cup sour cream
10 - 1/2 teaspoon salt
11 - 1/4 teaspoon black pepper
12 - 1/2 teaspoon dried thyme (optional)
13 - 1/2 cup shredded cheddar cheese

→ Topping

14 - 1 cup panko breadcrumbs
15 - 2 tablespoons unsalted butter, melted
16 - 2 tablespoons grated Parmesan cheese

# Directions:

01 - Preheat oven to 375°F. Grease a 2-quart baking dish.
02 - Boil pasta in salted water until al dente. Drain and set aside.
03 - Melt 2 tablespoons butter in a large skillet over medium heat. Add onion and garlic, sauté for 3 minutes until softened and fragrant.
04 - Sprinkle flour into skillet and cook, stirring constantly, for 1 minute.
05 - Gradually whisk in milk, simmering and stirring until thickened, about 3 to 4 minutes.
06 - Remove from heat, stir in sour cream, salt, pepper, thyme if using, and cheddar cheese until smooth.
07 - Fold tuna, peas, and cooked pasta gently into sauce mixture until evenly incorporated.
08 - Transfer mixture to prepared baking dish.
09 - Mix breadcrumbs, melted butter, and Parmesan cheese in a small bowl. Sprinkle evenly over casserole surface.
10 - Bake uncovered for 20 to 25 minutes until bubbling and topping is golden brown.
11 - Let rest for 5 minutes before serving.

# Helpful Tips:

01 -
  • Everything bakes in one dish so cleanup is practically nonexistent
  • The creamy sauce comes together faster than you can boil water for pasta
  • Leftovers taste even better the next day, if they last that long
02 -
  • Overbaking will dry out the sauce, so pull it when the topping is golden and the edges are bubbling
  • Drain the tuna thoroughly or the casserole will end up watery
  • The sauce will seem thick before baking but thins perfectly in the oven
03 -
  • Use freshly grated cheese instead of pre-shredded for the smoothest sauce
  • Let the roux cook for the full minute to avoid a raw flour taste
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