Homemade Tuna Noodle Casserole (Printable)

Creamy casserole with tender noodles, savory tuna, and crunchy onion topping for a cozy meal.

# What You'll Need:

→ Pasta

01 - 12 oz egg noodles

→ Seafood

02 - 2 cans (6 oz each) tuna in water, drained

→ Vegetables

03 - 1 cup frozen peas, thawed
04 - 1 small onion, finely chopped
05 - 2 cloves garlic, minced
06 - 1 cup sliced button mushrooms (optional)

→ Sauce

07 - 2 tablespoons unsalted butter
08 - 2 tablespoons all-purpose flour
09 - 2 cups whole milk
10 - ½ cup sour cream
11 - 1 teaspoon Dijon mustard
12 - ½ teaspoon salt
13 - ½ teaspoon black pepper
14 - ½ teaspoon dried thyme

→ Cheese

15 - 1 cup shredded cheddar cheese

→ Topping

16 - 1 cup crispy fried onions

# How to make it:

01 - Preheat oven to 375°F. Lightly grease a 9 x 13 inch baking dish.
02 - Boil egg noodles according to package instructions until al dente. Drain and set aside.
03 - In a large skillet over medium heat, melt butter. Add chopped onion and mushrooms; cook 4–5 minutes until softened. Add garlic and cook 1 more minute.
04 - Sprinkle flour over vegetables and stir for 1 minute. Gradually whisk in milk, stirring constantly until thickened, about 3–4 minutes.
05 - Stir in sour cream, Dijon mustard, salt, pepper, and thyme. Remove from heat.
06 - Add drained tuna, peas, shredded cheddar, and cooked noodles to the sauce. Gently fold until evenly combined.
07 - Transfer mixture to prepared baking dish.
08 - Evenly sprinkle crispy fried onions over the surface.
09 - Bake uncovered for 25–30 minutes until bubbly and golden.
10 - Allow to stand for 5 minutes to set before serving.

# Recipe Expert Tips:

01 -
  • Easy to make with simple ingredients
  • Crispy onion topping adds irresistible crunch
02 -
  • Check packaging for allergens in noodles and crispy onions.
  • Swiss or Monterey Jack cheese can be substituted for cheddar for variety.
03 -
  • Add a splash of lemon juice or chopped parsley for brightness before serving.
  • Greek yogurt works as a substitute for sour cream if desired.
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