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Tuna Mac-and-Cheese Bake with Crispy Onions

This comforting casserole blends tender macaroni, creamy cheese sauce, and flaky tuna with sweet pops of peas, all finished under a golden crown of crunchy fried onions. Tuna Mac-and-Cheese Bake with Crispy Onions is rich and cozy yet weeknight-friendly, perfect for family dinners or a nostalgic potluck dish that satisfies with every creamy, cheesy forkful.

  • Prep20 mins
  • Cook50 mins
  • Serves8
  • DifficultyEasy
Tuna Mac-and-Cheese Bake with Crispy Onions
  1. 1

    Preheat the oven to 350 degrees F (175 degrees C). Coat a 9x13-inch baking dish with nonstick spray.

  2. 2

    Bring 6 cups water to a boil in a medium saucepan. Stir in the macaroni from the box and cook for 7 minutes. Drain the macaroni, rinse under cold water, and drain again. Set the cheese sauce packet aside.

  3. 3

    Melt the butter in the same saucepan over medium heat. Add the milk and the cheese sauce packet; stir well. Mix in the condensed soup and cook until warmed through, about 3 minutes.

  4. 4

    Combine the drained macaroni, peas, and tuna in a bowl. Gently fold in the cheesy soup mixture. Transfer the mixture to the prepared baking dish.

  5. 5

    Bake in the preheated oven for 30 minutes. Sprinkle with Cheddar cheese, then sprinkle the French-fried onions over the top. Bake for another 5 minutes, until the onions are browned and the cheese is melted.