Side Dishes
This Kraft mac and cheese tuna casserole recipe brings back the comforting flavors of childhood dinners with a modern twist—one-pan simplicity that delivers crispy, cheesy goodness every time.
I developed this version after realizing how easy it is to elevate classic mac and cheese by adding tuna and a few key ingredients, creating a dish that’s nostalgic yet satisfying for today’s busy kitchens.
The secret lies in balancing the creamy mac and cheese with the briny, protein-rich tuna while ensuring the topping stays perfectly golden and crunchy.
The beauty of this recipe is its foolproof technique—no fancy ingredients or complicated steps required. You’ll start with a box of Kraft mac and cheese (the kind that brings back warm memories) and mix in canned tuna, peas, and milk for a creamy, hearty base.
The topping? A simple blend of breadcrumbs and melted butter that creates a crispy, golden crust you won’t find in any store-bought version. It’s the kind of dish that feels like a hug in a bowl, perfect for weeknight dinners or meal prep.
What you’ll end up with is a rich, cheesy casserole with tender tuna flakes, bright peas, and a crispy topping that holds up even after reheating. The flavors are balanced—creamy, savory, and just a little briny—making it a crowd-pleaser for both kids and adults.
The best part? It all comes together in one pan, so cleanup is a breeze. This is comfort food at its finest, with none of the fuss.
Serve it with a side salad or steamed vegetables for a complete meal, or enjoy it on its own as a satisfying main dish. The leftovers reheat beautifully, making it ideal for busy families or anyone who loves easy, flavorful dinners.
Here’s how to make it—simple, nostalgic, and impossible to resist.
Ingredients for kraft mac and cheese tuna casserole
Six simple ingredients transform Kraft mac and cheese into nostalgic tuna casserole perfection.
| Ingredient | Amount | Notes |
|---|---|---|
| Kraft Macaroni and Cheese (Regular Box) 🍝 | 1 box | Regular flavor, not low-fat |
| Canned Tuna in Water 🐟 | 15 oz | Drained well, flaked |
| Frozen Peas 🌽 | 1 cup | Thawed, bright green |
| Whole Milk 🥛 | ½ cup | For creaminess |
| Unsalted Butter 🧈 | ½ cup | Melted, full-fat |
| Panko Breadcrumbs 🍞 | 1 cup | For crispy topping |
| Shredded Cheddar Cheese 🧀 | 1 cup | Extra sharp preferred |
| Garlic Powder 🧄 | 1 tsp | For subtle flavor boost |
| Onion Powder 🧅 | 1 tsp | For depth of flavor |
| Salt 🧂 | ½ tsp | Adjust to taste |
| Black Pepper 🌶️ | ¼ tsp | Freshly ground |
| Dried Parsley 🌿 | 1 tbsp | For garnish |
The Kraft box is the foundation—regular flavor only, not the low-fat version. Grab the 14.3 oz box from any grocery store; it's the standard for this recipe. For tuna, Store brand or StarKist work perfectly—just drain it well and flake with a fork. The frozen peas should be bright green, not gray or wilted; Green Giant or Birds Eye are reliable choices. Panko breadcrumbs are non-negotiable for that perfect crispy topping—Trader Joe's sells them in bulk for better value. The cheddar needs to be extra sharp for maximum flavor punch; Kraft or Cabot work well.
No tuna in water? Tuna in oil works, but drain it extra well. Short on milk? Eggnog or half-and-half adds richness. The butter must be full-fat—none of that low-fat nonsense. No panko? Regular breadcrumbs plus 1 tsp cornstarch for crispiness. The dried parsley can be swapped for fresh parsley at half the amount, but it wilts fast. For a vegetarian option, substitute chickpeas for tuna—drain and rinse well. The garlic and onion powders are optional but recommended; McCormick or Badia are solid choices if you need to buy them.
This casserole reheats beautifully—cover with foil and bake at 350°F for 15 minutes. Keeps 4-5 days in the fridge, freezes for 3 months. I always make a double batch and portion it into glass containers for easy lunches. The topping stays crispy for about 2 days if stored properly, but reheating makes it even better. For extra crunch, broil for 2 minutes before serving.
Why You'll Love This Recipe
- Let’s talk savings: a box of mac and cheese, a can of tuna, and frozen peas won’t break the bank, but the leftovers? They’re pure gold. I’ve fed my family for three days with one batch, and the taste stays just as good—no sad, dry casserole here. Not the prettiest, but the taste makes up for it every time.
- One-Pot Magic: I swear by this recipe because it’s all in one skillet—no extra bowls, no messy transfers. Just dump the mac and cheese mix, stir in the tuna and peas right out of the can, and let the milk and butter work their sauce magic together. Honestly, I’ve never had a casserole this easy where the flavors still feel special.
- Creamy Crunch Combo: The tuna adds that salty, flaky texture while the peas bring a little pop of freshness, but the real star? That buttery mac and cheese sauce—rich enough to coat every forkful. I’ll be real: my kids fight over the last bite, and I’ve never seen them go for seconds on anything else.
- Lunchbox Hero: This dish is my go-to for meal prep because it reheats like a dream and keeps well for days. Pack it cold for lunches or serve it warm—either way, it’s a hit. Between us, I’ve even brought it to potlucks, and no one guessed it was just a box of mac and cheese with a few pantry staples.
Step-by-step instructions for Kraft mac and cheese tuna casserole
This one-pan wonder combines comfort food classics with crispy texture and hearty protein.
Prepare the Macaroni and Cheese Base
Preheat your oven to 375°F. In a large, deep oven-safe skillet, melt the ½ cup unsalted butter over medium heat until fully liquid. Add the 1 box Kraft Macaroni and Cheese powder and whisk vigorously for 1-2 minutes until completely dissolved and smooth.
Gradually pour in the ½ cup whole milk while continuing to whisk. The mixture will thicken noticeably as it comes together. Remove from heat and stir in the 1 cup shredded cheddar cheese until fully melted and creamy. Set aside while you prepare the remaining ingredients.
Cook the Tuna and Vegetable Mixture
In the same skillet, return the heat to medium-low and add the 15 oz drained canned tuna in water, breaking it into small, even flakes with a fork. Stir in the 1 cup thawed frozen peas, 1 tsp garlic powder, 1 tsp onion powder, ½ tsp salt, and ¼ tsp black pepper.
Cook for 3-4 minutes until the peas are heated through and the tuna mixture is evenly seasoned. You'll notice the peas will soften slightly and release their bright green color. Remove from heat and set aside with the macaroni and cheese base.
Combine and Top with Crispy Crumb Mixture
Carefully combine the tuna-pea mixture with the macaroni and cheese base in the skillet, stirring gently to distribute everything evenly. Spread the mixture into an even layer across the skillet - this ensures even baking and crispy edges.
In a small bowl, mix together the 1 cup panko breadcrumbs and 1 tbsp dried parsley. Sprinkle this mixture evenly over the top of the casserole, pressing down gently with the back of a spoon to help it adhere. This creates that signature crispy texture we're after.
Bake Until Bubbly and Golden
Transfer the skillet to the preheated 375°F oven and bake for 20-25 minutes until the top is deep golden brown and the edges are bubbling. You'll know it's ready when the cheese has melted completely and the crumb topping is crispy.
For best results, let the casserole rest for 5 minutes after baking. This allows the juices to redistribute slightly and makes serving easier. The internal temperature should reach 165°F at the center. Serve immediately with a side of steamed green beans or a simple garden salad.
Pro Tips For Making Kraft Mac And Cheese Tuna Casserole
- Drain Macaroni Well: The Kraft box says "drained," but I learned the hard way—leave those noodles sitting in the water, and your casserole turns into a soggy mess. Rinse them under cold water twice and let them sit in a colander for 30 seconds to evaporate extra moisture. Trust me, your texture will thank you.
- Drain Tuna, Don’t Rinse: That canned tuna comes packed in water, and skipping the drain-and-drain step leaves your casserole tasting like a sad swimming pool. Use a slotted spoon to transfer the tuna directly into the mixing bowl—no rinsing, just pat it dry with a paper towel if it’s extra wet. This keeps the flavor concentrated where it matters.
- Skip the Peas’ First Thaw: I used to thaw frozen peas in a bowl while I prepped everything else, but honestly? Just toss them straight from the freezer into the hot mac and cheese mixture. They’ll soften in minutes, and you save time without sacrificing texture. (Yes, even if you’re impatient like me.)
- Stir in Butter Last: The Kraft box calls for butter to be melted into the cheese sauce, but I’ve found the real magic happens when you fold in a pat of cold, cubed butter at the very end. Stir it in just until melted—this adds richness without turning the casserole greasy. Sounds weird, but it works: your dish gets that velvety finish without extra effort.
Essential equipment for this dish
One-Pan Essentials
This casserole is all about simplicity, so you only need three key tools: a large, deep oven-safe skillet (I use my 12-inch Lodge cast iron—it holds heat beautifully), a whisk, and a spoon for mixing.
The skillet must be oven-safe to avoid transferring the casserole mid-cook. If you don’t have cast iron, a heavy stainless steel or ceramic skillet works just as well. 🔥
Crispy Topping Secrets
The panko breadcrumbs are non-negotiable for that perfect golden crust. I keep a small bowl and fork on hand to mix them with parsley before topping. For extra crispiness, I sometimes toast the breadcrumbs in a dry skillet over medium heat for 2-3 minutes before adding them to the casserole.
A fine-mesh sieve helps sift the crumbs evenly over the top—no clumps!
Butter and Cheese Prep
Melt the ½ cup unsalted butter in the same skillet you’ll bake in—this ensures even heat distribution. For the cheese, I shred it myself using a box grater (it melts more smoothly than pre-shredded).
If you’re short on time, Kraft shredded cheddar works fine, but avoid the pre-shredded kind with anti-caking agents—it can make the sauce grainy. 🧀
Temperature Control
An oven thermometer is worth its weight in gold here. I set my oven to 375°F, but it often runs hotter. The thermometer helps me adjust for that deep golden brown topping.
If your oven runs cool, bump the temp to 390°F for the last 5 minutes of baking to crisp up the crumbs. Pro tip: Place the skillet on the middle rack for even heat distribution.
Optional Upgrades
For a fancier touch, I sometimes add 1 tbsp Dijon mustard to the mac and cheese base—it cuts through the richness beautifully. A small offset spatula helps spread the mixture evenly in the skillet.
If you’re making this ahead, a glass baking dish (like Pyrex) is ideal for storage and reheating. The glass conducts heat evenly, preventing hot spots.
Nutrition facts
Frequently asked questions
Why does my tuna casserole end up soggy instead of crispy?
The most common reason is overmixing the crumb topping or not pressing it down firmly. Use 1 cup panko and mix it with 1 tbsp parsley first, then press gently with a spoon before baking. Also, avoid opening the oven door early—keep it sealed for the full 20-25 minutes at 375°F to let the steam escape gradually.
Can I use tuna in oil instead of water?
Yes, but drain it thoroughly and rinse with cold water to remove excess oil. The oil can make your casserole greasy if left unchecked. For every 5 oz of tuna in oil, add 1 extra tbsp of milk to balance the richness. The flavor will be slightly richer, but the texture stays the same.
How do I make this vegetarian?
Swap the tuna for 1 can (15 oz) chickpeas, drained and rinsed well. Add 1 tsp smoked paprika and ½ tsp garlic powder to mimic the tuna's savory depth. For extra protein, stir in ½ cup crumbled feta cheese at the end. The peas still add brightness, and the crumb topping stays perfectly crispy.
What’s the best way to reheat leftovers?
Cover the casserole with foil and reheat at 350°F for 15-20 minutes until warmed through. For extra crispiness, broil for 2-3 minutes at the end. Avoid microwaving—it makes the topping rubbery. Store leftovers in an airtight container for up to 5 days. The texture holds up best when reheated gently.
Can I add other vegetables besides peas?
Try ½ cup corn kernels (fresh, frozen, or canned) or ½ cup diced bell peppers for sweetness. For heartier options, add 1 cup chopped broccoli (steamed first to avoid sogginess) or ½ cup diced carrots. Just reduce the peas to ½ cup to balance the moisture.