Kraft Macaroni and Cheese Tuna Casserole Recipe: Nostalgic One-Pan Comfort with Crispy Top

This Kraft Macaroni and Cheese Tuna Casserole recipe brings back the comforting flavors of childhood dinners with a modern twist—creamy, cheesy layers topped with crispy golden breadcrumbs.

The magic happens in the one-pan assembly, where perfectly cooked macaroni, flaky tuna, and melted cheese blend into a rich, satisfying dish that’s ready in under an hour. I’ve perfected this method to ensure the pasta stays tender while the top develops that satisfying crunch.

The secret to this casserole’s success lies in balancing textures and flavors: tender macaroni, flaky tuna, and a velvety cheese sauce all come together in a single dish.

A simple breadcrumb topping adds that coveted crispy contrast, while a touch of mustard and garlic in the cheese sauce elevates the flavor profile beyond the classic. The best part? It’s a one-pan wonder, meaning minimal cleanup and maximum comfort.

By the time it emerges from the oven, you’ll have a dish that’s nostalgic yet refined—creamy, cheesy, and just crispy enough to make every bite satisfying. The aroma alone will have everyone at the table asking for seconds, and the leftovers reheat beautifully for lazy weeknight meals.

This is the kind of recipe that proves comfort food doesn’t have to be complicated.

Serve it with a simple green salad or steamed vegetables to round out the meal, or enjoy it as-is for a hearty, no-fuss dinner. Here’s how to make it—step by step—for a dish that feels like a warm hug in every forkful.

Ingredients for kraft macaroni and cheese tuna casserole

Pantry staples and a few key ingredients transform into nostalgic, crispy-topped comfort food.

The Kraft Macaroni and Cheese boxes are the foundation here—stick with the original flavor for that classic taste. Flaked tuna should be high-quality, like Starkist or Chicken of the Sea, and the 5 oz cans are perfect for this serving size. For the breadcrumbs, Panko creates that ideal crispy texture, but regular dry breadcrumbs work in a pinch. The green onions add a fresh pop, so grab the freshest bunch you can find—Trader Joe's or Whole Foods usually have the best selection. Sharp cheddar elevates the dish beyond the classic, so Kraft or Cabot are my go-tos.

No Kraft boxes? Substitute 2 cups shredded cheddar plus 1/4 cup cornstarch for the powdered cheese. Out of tuna? Chicken or shrimp works equally well—just adjust cooking time. The mustard is key for that tangy kick, but if you're sensitive to heat, Dijon mustard at half the amount works. For the garlic powder, fresh garlic at double the amount adds a more complex flavor. The butter for the topping should be unsalted—salted can make the breadcrumbs too salty.

This casserole reheats beautifully—cover with foil for 5 minutes to keep the top crispy. Keeps in the fridge for 4-5 days and freezes for 3 months. I always make a double batch because it disappears fast. For extra crispiness, broil for 2-3 minutes before serving. Store leftovers covered to maintain texture.

Step-by-step instructions for Kraft macaroni and cheese tuna casserole

Here's how to create a nostalgic, comforting dish with a crispy breadcrumb topping that'll bring back childhood memories.

Bring a large pot of water to a rolling boil and add 2 cups elbow macaroni. Cook according to package instructions until 1 minute before al dente—you want it slightly undercooked so it absorbs the cheese sauce perfectly. Drain the pasta in a colander and set aside.

Don't rinse the pasta after draining—those starchy strands help create a creamier sauce. I like to give it a quick shake in the colander to break up any clumps before moving to the next step. This ensures even distribution of the cheese mixture later.

In a large mixing bowl, combine the drained elbow macaroni, 2 boxes Kraft Macaroni and Cheese Powder, 2 cups milk, 1 tablespoon yellow mustard, 1 teaspoon garlic powder, 0.5 teaspoon salt, and 0.25 teaspoon black pepper. Stir vigorously until the cheese powder is completely dissolved and the mixture is smooth.

This is where the magic happens—the mustard adds tanginess while the garlic powder deepens the flavor. If the mixture looks too thick, add 1-2 tablespoons of water to loosen it. The sauce should coat the back of a spoon but still be thick enough to cling to the pasta.

Gently fold in the 2 cans drained flaked tuna and 0.5 cup shredded sharp cheddar cheese using a rubber spatula. The tuna should be evenly distributed throughout the macaroni mixture. Be careful not to overmix—just combine until fully incorporated.

Here's the thing—tuna can get rubbery if overworked, so handle it gently. The sharp cheddar adds a nice tangy contrast to the creamy cheese sauce. Taste the mixture now and adjust seasoning if needed—this is your last chance before baking.

Preheat your oven to 375°F. Generously grease a 9x13-inch baking dish with 2 tablespoons butter, then transfer the macaroni mixture to the dish. Spread it out evenly for even baking.

In a small bowl, mix together the 0.5 cup dried breadcrumbs and 2 tablespoons melted butter. Sprinkle this mixture evenly over the top of the casserole, then scatter the chopped 2 whole green onions on top. The breadcrumb topping will create that coveted crispy texture we're after.

Bake uncovered for 25-30 minutes until the top is deep golden brown and the edges are bubbling. You'll know it's ready when the breadcrumbs look crispy and the cheese sauce has set slightly but still looks creamy.

Real talk: Don't overbake. The casserole will continue cooking slightly as it rests. If the top starts to brown too quickly, tent it loosely with aluminum foil. Let it rest for 5 minutes before serving to allow the layers to set properly. The result should be a comforting, crispy-topped dish that brings back all the warm feelings.

Essential equipment for kraft macaroni and cheese tuna casserole

Must-Have Baking Dish

You’ll need a 9x13-inch baking dish—this is non-negotiable for even baking and that perfect golden crust. I use USA Pan Heavy Gauge Aluminum because it distributes heat evenly, but any glass or metal baking dish of the same size works.

Avoid non-stick pans—they can cause the breadcrumbs to stick instead of crisp up. Grease it well with 2 tablespoons butter (melted) to prevent sticking, especially if you’re using a glass dish. 🧈

Mixing Tools

A large mixing bowl (at least 8-quart capacity) is essential for combining the macaroni, cheese sauce, and tuna without spills. I prefer stainless steel for durability, but any non-reactive material (like glass or ceramic) works.

A rubber spatula is your best friend for folding in the tuna gently—it prevents breaking up the flakes. For stirring the cheese sauce, a whisk helps dissolve the powder completely. 🥄

Measuring Essentials

Precision matters here! Use a liquid measuring cup for the 2 cups milk and a dry measuring cup for the 2 cups macaroni and ½ cup breadcrumbs. For spices like garlic powder and mustard, a small measuring spoon set ensures accuracy.

I keep a kitchen scale handy for the ½ cup shredded cheddar—it’s more consistent than volume measurements. Pro tip: Measure the Kraft Macaroni and Cheese Powder directly from the box into your mixing bowl to avoid spills. 📏

Oven Thermometer

Your oven’s temperature display isn’t always accurate, and this casserole relies on 375°F precision. An instant-read oven thermometer (like Thermoworks Oven Thermometer) is a game-changer—it ensures the breadcrumb topping crisps perfectly without burning.

I’ve seen ovens run 25°F hotter or cooler than set, which can ruin the texture. Place it near the casserole while baking to monitor. 🌡️

Breadcrumbs & Butter Prep

For the crispy topping, Panko breadcrumbs are ideal, but any dried breadcrumbs work. Toast them lightly in a dry pan for 2 minutes before mixing with 2 tablespoons melted butter—this enhances their crunch.

Use a small bowl to combine them, then sprinkle evenly over the casserole. A pastry brush helps spread the butter evenly on the baking dish before adding the mixture. 🍞

Optional but Helpful

A fine-mesh strainer comes in handy if you’re draining the tuna well, and aluminum foil (for tenting if needed) is worth keeping nearby. For serving, a sharp knife (like Victorinox 8-inch) cuts through the crispy top cleanly.

If you love garnishes, fresh green onions add a bright pop—chop them just before serving to keep them crisp. 🧅

Frequently asked questions