Tuna Noodle Casserole
A cozy, old-fashioned casserole that brings back childhood memories. Tender egg noodles, flaky tuna, and sweet green peas are folded into a creamy mushroom sauce, then topped with a golden, crunchy breadcrumb crust. Ready in under an hour, it's pure comfort on a weeknight.
For 4 servings
- prep
Preheat the oven and prep ingredients.
Preheat your oven to 375°F (190°C). Grease a 9x13-inch casserole dish with a bit of butter or cooking spray. Drain the canned tuna, flake it with a fork, and set aside. Thaw the frozen peas under cold running water and drain well.
- boil · ~8 min
Cook the egg noodles.
Bring a large pot of water to a rolling boil. Add a teaspoon of salt, then the egg noodles. Cook for 1 minute less than the package directions recommend — they'll finish cooking in the oven. Drain in a colander and set aside.
TIPSlightly undercooking the noodles prevents a mushy casserole. - saute · ~5 min
Sauté the onion and garlic.
In a medium saucepan, melt 1 tablespoon of butter over medium heat. Add the chopped onion and cook until soft and translucent, about 4 minutes. Add the minced garlic and sauté for another 30 seconds until fragrant.
TIPDon't let the garlic brown — it turns bitter. - mix · ~6 min
Make the creamy sauce.
Sprinkle the flour over the onion mixture and stir constantly for 1 minute to cook out the raw flour taste. Slowly pour in the milk while whisking continuously to avoid lumps. Bring to a gentle simmer and cook until thickened, about 4-5 minutes. Remove from heat, then stir in a pinch of salt and a pinch of black pepper.
TIPWhisking constantly is the secret to a smooth, lump-free sauce. - assemble
Combine the casserole filling.
In the greased casserole dish, combine the drained noodles, flaked tuna, and thawed peas. Pour the cream sauce over the top and stir gently until everything is evenly coated. Stir in the lemon juice for brightness.
TIPBe gentle when mixing to keep the tuna and noodles from breaking apart. - bake · ~20 min
Add the crunchy topping and bake.
Melt the remaining 2 tablespoons of butter and toss with the breadcrumbs until evenly coated. Sprinkle the buttered breadcrumbs over the top of the casserole in an even layer. Place in the preheated oven and bake for 20 minutes, until the top is golden brown and the filling is bubbly around the edges.
TIPFor extra crunch, switch the oven to broil for the last 1-2 minutes — but watch it closely! - rest · ~5 min
Rest before serving.
Remove the casserole from the oven and let it rest on a cooling rack for 5 minutes. This helps the sauce set up so the portions hold their shape when scooped.
- serve
Serve warm.
Scoop generous portions onto plates or into shallow bowls and serve hot.
What to keep in mind.
6 tips from the recipe — small details that make a real difference to the final dish.
- 1Undercook the noodles by 1 minute so they don't turn mushy after baking.
- 2Whisk the milk into the flour mixture slowly to guarantee a lump-free sauce.
- 3Use good-quality canned tuna packed in water for a cleaner, fresher flavor.
- 4Thaw frozen peas under cold water and drain well to avoid watering down the sauce.
- 5Let the casserole rest 5 minutes after baking so the sauce sets and servings hold shape.
- 6For an extra-golden crust, broil the topping for the last 1–2 minutes, watching closely.
Adapt it for your goals.
Vegetable-loaded
Add 1 cup of sautéed mushrooms and a handful of chopped spinach for extra veggies and earthy flavor.
cheesyCheesy
Stir in 1 cup of shredded sharp cheddar or Gruyère into the sauce for a richer, more decadent casserole.
gluten freeGluten-free
Use gluten-free egg noodles and substitute the all-purpose flour with a 1:1 gluten-free flour blend.
herb crustedHerb-crusted
Mix 1 tablespoon of chopped fresh parsley and 1 teaspoon of dried thyme into the breadcrumb topping for a fragrant crunch.
Why this is on our healthy list.
Lean Protein Source
Canned tuna provides high-quality, low-fat protein that supports muscle maintenance and repair.
Rich in B Vitamins
Egg noodles and tuna supply B vitamins like niacin and B12, important for energy metabolism and nerve health.
Includes Veggie Serving
Green peas add fiber, vitamin C, and a touch of natural sweetness, making the dish more balanced.
Calcium from Milk
Whole milk in the sauce contributes calcium for strong bones and teeth.
Frequently asked questions
Yes, but drain it well and expect a richer, slightly heavier casserole. Oil-packed tuna can also make the dish greasier.



