This old-fashioned tuna casserole recipe combines tender egg noodles, flaky canned tuna, peas and a creamy mushroom sauce topped with a buttery crunchy crust — a simple, nostalgic weeknight meal the whole family will love.
Preheat the oven to 350°F (175°C). Grease a 9x13-inch baking dish.
Cook the egg noodles according to package directions until just al dente; drain and set aside.
In a large bowl, stir together cream of mushroom soup, milk, drained tuna, thawed peas, and half of the shredded cheddar (if using). Season with salt and pepper.
Fold the cooked noodles into the tuna mixture until evenly coated, then transfer into the prepared baking dish.
Sprinkle remaining cheese over the top (optional) and cover with crushed potato chips or breadcrumbs mixed with a little melted butter for a golden crust.
Bake uncovered for 20–25 minutes, until bubbly and the topping is golden. Let rest 5 minutes before serving.
Notes
This classic casserole is easily doubled for a crowd and reheats well.Swap cream of mushroom for cream of celery or add sautéed onions for extra flavor; use French fried onions for an alternate crunchy topping.