Crockpot Tuna Noodle Casserole

Crockpot tuna noodle casserole is a cozy dinner that brings all the nostalgic flavors of the classic casserole with a few fresh twists. Tender zucchini, canned tuna, and plenty of creamy, cheesy goodness come together in one easy slow cooker meal that's hearty enough for the whole family while sneaking in an extra serving of veggies.

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The backstory.

I'll admit it - tuna noodle casserole wasn't something I asked for as a kid, but somewhere along the way I started craving those simple, comforting dinners that remind you of home. This version keeps everything I love about the classic while adding fresh zucchini, dill, and plenty of melty cheese. It feels a little lighter, tastes a little fresher, and still delivers that cozy casserole everyone gathers around the table for.

It's a must make.

If you're looking for a comforting dinner that's simple to prep, this crockpot tuna noodle casserole will be a go-to.

• Classic comfort with a fresh twist. Creamy sauce, cheesy layers, tender egg noodles, and fresh zucchini make this nostalgic casserole feel right at home on today's dinner table.
• Easy to put together. Once everything is layered in the slow cooker, it quietly cooks while you tackle the rest of your day.
• Budget-friendly and filling. Canned tuna, pantry staples, and vegetables come together to create a hearty family favorite without stretching the grocery budget.
• Great for leftovers. The flavors continue to come together after cooking, making tomorrow's lunch just as delicious.

Let's talk flavor and texture.

Every bite is creamy, cheesy, and packed with comforting flavor. The tender egg noodles soak up the rich sauce while the flaky tuna blends perfectly into each forkful. Fresh dill brightens everything up, and the thin slices of zucchini soften beautifully without disappearing completely. The result is a hearty casserole that's rich enough to satisfy but still feels fresh and balanced.

What you'll need.

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Most of the ingredients for this crock pot tuna noodle casserole are pantry and refrigerator staples that work together to create a creamy, comforting casserole dinner.

• Olive oil: Helps blister the pasta and soften the vegetables before they go into the slow cooker.
• Celery: Adds classic casserole flavor and a little texture.
• Onion: Brings savory flavor to every bite.
• Dry medium egg noodles: They cook right in the slow cooker, so there's no need to boil them first.
• Low-sodium chicken broth: Gives the noodles plenty of liquid to cook while adding flavor.
• Condensed cream of chicken soup: Creates the rich, creamy base.
• Sour cream: Adds extra creaminess with a slight tang.
• Dijon mustard: Gives the sauce a subtle depth without overpowering the dish.
• Fresh dill: Brightens the casserole with fresh herb flavor. Dried dill works too.
• Kosher salt: Enhances all the flavors.
• Black pepper: Adds gentle seasoning.
• Zucchini: Thin slices cook until tender while adding extra vegetables.
• Canned tuna: Drain and flake it before adding for the best texture.
• Shredded jack cheese: Colby Jack, cheddar, mozzarella, Swiss, or Gouda all work well.
• Optional garnishes: Extra shredded cheese, chopped fresh tomatoes, fresh dill, or chives add a fresh finishing touch.

For exact ingredient quantities, please see the recipe card below!

How to make slow cooker tuna casserole.

Crockpot tuna noodle casserole comes together in just a few simple steps before the slow cooker takes over.

1. Stir together the blistered pasta, vegetables, broth, soup, sour cream, tuna, mustard, dill, and seasonings until everything is evenly combined.
2. Spread half of the mixture into a greased slow cooker, then layer with zucchini and shredded cheese.
3. Repeat the layers, finishing with cheese on top.
4. Cover and cook on HIGH until the noodles in the center are tender and fully cooked.
5. Taste and adjust the seasoning if needed, then garnish and serve warm.

Make it your way.

One of my favorite things about slow cooker tuna casserole is how easy it is to tweak based on what's already in your refrigerator.

• Swap the Jack cheese for cheddar, smoked Gouda, mozzarella, Swiss, or pepper jack.
• Add 1 to 2 cups of chopped baby spinach between the layers.
• Substitute a different noodle for egg noodles
• Replace the canned tuna with canned salmon or crab.
• Add an extra handful of shredded cheese on top before serving if you love extra cheesy casseroles.
• Use a spicy mustard or add crushed red pepper flakes to your casserole if you want to make it spicier.
• Add other vegetables to your casserole such as diced onion, frozen peas, or shredded carrot.

How to serve it.

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While crockpot tuna noodle casserole is satisfying on its own, a few simple additions make it feel like a complete meal.

• Sprinkle chopped fresh dill or chives over the top just before serving.
• Add diced fresh tomatoes for a little color and freshness.
• Serve with a crisp green salad and your favorite vinaigrette.
• Pair it with steamed green beans, broccoli, or roasted asparagus.
• Offer buttery dinner rolls or crusty bread to soak up the creamy sauce.
• Finish with crushed Ritz crackers, potato chips, or crispy fried onions if you enjoy a little crunch.

Kori's tips.

• Don't skip blistering the pasta - It helps keep the egg noodles from becoming overly soft during cooking while giving the onions and celery a head start.
• Slice the zucchini thin - Thin slices cook evenly and blend beautifully into the casserole.
• Check the center - The casserole is ready once the noodles in the very middle are tender.
• Need a shortcut? - You can stir everything together instead of layering if you're short on time. The tuna noodle casserole crockpot version will still turn out delicious.

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