If you’re on a low-carb journey but crave comfort food, you’re in for a treat! This keto tuna casserole is creamy, cheesy, and downright delicious—without the carb-heavy pasta. And let’s be honest, who doesn’t love a good throwback to childhood casseroles? Except this time, we’re skipping the processed canned soups and bringing in fresh, keto-friendly ingredients.
In this guide, I’ll walk you through how to make the perfect keto tuna casserole, from choosing the best ingredients to serving up a dish that even carb-lovers will devour. Plus, I’ve got hacks for making it dairy-free, adding extra protein, or jazzing it up with veggies. So, grab your apron, and let’s do this!
Introduction to Keto Tuna Casserole
What is Keto Tuna Casserole?
Think of a traditional tuna noodle casserole—but instead of carb-heavy noodles, we swap in something low-carb and just as satisfying. This dish combines flaky tuna, a creamy sauce, melted cheese, and crunchy toppings to create a warm, comforting meal that fits perfectly into a keto diet.
The best part? It’s a one-pan wonder! Toss everything together, bake it, and boom—you’ve got dinner sorted.
The Popularity of Tuna Casserole in Low-Carb Diets
Let’s be real—keto can get repetitive. After a while, bacon and eggs just don’t cut it. That’s where casseroles save the day. They’re easy to make, meal-prep friendly, and packed with healthy fats and protein.
Tuna, in particular, is a powerhouse protein for keto dieters. It’s affordable, versatile, and packed with omega-3s—which help with brain function, heart health, and keeping you full.
Health Benefits of a Keto-Friendly Tuna Casserole
So why should this dish make it into your weekly meal rotation?
✅ Low in Carbs – Traditional tuna casserole is loaded with pasta, but this version keeps it low-carb while still delivering that creamy, cheesy goodness.
✅ High in Healthy Fats – Cheese, cream, and healthy oils provide the fats your body thrives on in ketosis.
✅ Protein-Packed – Tuna is a lean protein powerhouse, helping to build muscle and keep you full longer.
✅ Quick and Easy – No one has time for fancy, complicated dinners every night. This dish is simple, delicious, and comes together in under 40 minutes.
Essential Ingredients for a Keto Tuna Casserole
Now, let’s talk ingredients! A keto tuna casserole isn’t just about swapping noodles—it’s about building layers of flavor while keeping it low-carb and satisfying. Below, we’ll break down everything you need to whip up a creamy, cheesy, and downright delicious keto-friendly casserole.
Choosing the Right Tuna for Your Casserole
Not all tuna is created equal, so picking the right one makes all the difference. Here’s what you need to know:
- Canned Tuna in Water or Oil? Oil-packed tuna adds extra richness, while water-packed tuna keeps it light and flaky. Both work, but choose wild-caught for better quality.
- Chunk Light vs. Solid White? Chunk light tuna has a milder taste and softer texture, while solid white albacore offers a firmer bite. Either is fine—it’s all about preference.
- Fresh vs. Canned? If you’ve got fresh tuna, by all means, use it! Just sear and flake it before adding it to the casserole.
Low-Carb Alternatives to Traditional Noodles
Classic tuna casserole usually calls for egg noodles or pasta, but we’re skipping the carbs! Try these keto-approved noodle swaps instead:
- Zucchini Noodles (Zoodles) – Light, fresh, and adds a mild crunch.
- Spaghetti Squash – A great way to mimic real noodles with a slightly sweet taste.
- Hearts of Palm Pasta – A solid pasta substitute with a neutral flavor.
- Shirataki Noodles – Nearly zero carbs, but they have a slippery texture some people don’t love.
- Cauliflower Rice – Not a noodle, but works great for a thicker, heartier casserole.
👉 Looking for a simple way to prepare spaghetti squash? Check out this Easy Air Fryer Spaghetti Squash Recipe. It’s quick, easy, and perfect for meal prep. Adding it to your keto tuna casserole gives a light, slightly sweet flavor that blends perfectly with the creamy sauce.
Creamy Base Options: Dairy and Non-Dairy Choices
What’s a keto tuna casserole without a rich, creamy sauce? Here’s how to make it work:
- Heavy Cream + Cream Cheese – The ultimate creamy combo.
- Greek Yogurt or Sour Cream – Adds a slight tang while keeping it thick.
- Mayonnaise – Some recipes use it for extra richness.
- Coconut Cream (Dairy-Free Option) – A great non-dairy alternative that still gives that luscious texture.
Incorporating Keto-Friendly Vegetables
Want to add more fiber and texture? Toss in some keto-friendly veggies like:
Bell Peppers – Slightly sweet, but low in carbs.
Broccoli – Adds a slight crunch and extra nutrients.
Spinach – Wilts down and blends seamlessly into the casserole.
Mushrooms – Adds earthy, umami goodness.
Step-by-Step Recipe for the Best Keto Tuna Casserole
Ready to cook? This keto tuna casserole is so easy, you’ll wonder why you didn’t make it sooner. Just mix, bake, and enjoy!
Preparation and Cooking Time
⏱ Prep Time: 10 minutes
🔥 Cook Time: 25 minutes
🍽 Servings: 4-6
Detailed Ingredient List
| Ingredient | Amount |
|---|---|
| Canned tuna (drained) (Benefit & Nutrition) | 2 cans (5 oz each) |
| Low-carb noodles or sub | 2 cups |
| Heavy cream | ½ cup |
| Cream cheese (softened) | 4 oz |
| Shredded cheddar cheese | 1 ½ cups |
| Parmesan cheese | ¼ cup |
| Garlic powder | 1 tsp |
| Onion powder | 1 tsp |
| Salt & black pepper | To taste |
| Keto-friendly veggies (optional) | 1 cup |
| Crushed pork rinds (for crunch) | ½ cup |
👉 Want it dairy-free? Swap heavy cream for coconut cream and use dairy-free cheese!
Cooking Instructions
1️⃣ Preheat the oven to 375°F (190°C). Lightly grease a baking dish.
2️⃣ Prepare your noodles – If using zucchini noodles, pat them dry. If using shirataki noodles, rinse and dry them well.
3️⃣ Make the creamy base – In a mixing bowl, whisk together cream cheese, heavy cream, garlic powder, onion powder, salt, and pepper until smooth.
4️⃣ Combine everything – Stir in drained tuna, shredded cheese, and veggies (if using). Mix well, then fold in the noodles.
5️⃣ Assemble the casserole – Pour the mixture into the greased baking dish. Sprinkle Parmesan cheese and crushed pork rinds on top for a crispy finish.
6️⃣ Bake for 25 minutes – or until the top is golden and bubbly.
7️⃣ Cool & Serve – Let it sit for a few minutes before digging in.
Tips for Achieving the Perfect Creamy Texture
- Don’t skip the cream cheese – It thickens the sauce beautifully.
- Pat dry zucchini or shirataki noodles – This prevents a watery casserole.
- Use freshly grated cheese – Pre-shredded cheese contains anti-caking agents that mess with the texture.
Variations and Substitutions
One of the best things about a keto tuna casserole is its flexibility. You can easily switch up ingredients to suit your taste or dietary needs. Let’s explore some tasty variations and smart substitutions to keep your casserole game strong.
Alternative Proteins: Chicken, Salmon, or Shrimp
If you’re not in the mood for tuna, no worries! Swap it out with:
- Chicken: Use cooked, shredded chicken for a hearty twist.
- Salmon: Canned or cooked salmon adds a rich flavor.
- Shrimp: Cooked shrimp brings a seafood flair that’s simply delicious.
These alternatives keep the dish exciting and cater to different protein preferences.
Vegetable Additions: Broccoli, Spinach, or Zucchini
Boost the nutritional value and add some crunch by incorporating:
- Broccoli: Lightly steamed florets blend well and add fiber.
- Spinach: Fresh or frozen spinach wilts nicely into the casserole.
- Zucchini: Diced or sliced, it offers a mild flavor and extra moisture.
These veggies not only enhance the taste but also make the casserole more filling.
Dairy-Free Options for Lactose Intolerance
For those avoiding dairy, you can still enjoy a creamy casserole by substituting:
- Coconut Cream: Provides a rich, creamy base without dairy.
- Nutritional Yeast: Adds a cheesy flavor minus the cheese.
- Dairy-Free Cheese: Use your favorite plant-based cheese alternatives.
These swaps ensure your casserole remains creamy and satisfying without any dairy.
Serving Suggestions and Side Dishes
Pairing your keto tuna casserole with the right sides can elevate your meal to a whole new level. Here are some ideas to complement your casserole and round out your plate.
Pairing Your Casserole with Keto-Friendly Sides
To keep your meal low-carb and satisfying, consider these sides:
- Cauliflower Rice – A light, fluffy alternative to rice that soaks up the casserole’s flavors.
- Green Salad – A simple mix of leafy greens with a tangy vinaigrette balances the richness.
- Roasted Asparagus – Adds a crispy texture and earthy taste to your meal.
Want another low-carb side dish to mix things up? Try this Best Low-Carb Chicken Crust Caesar Salad Pizza. The crispy, protein-packed crust pairs wonderfully with the creamy, cheesy goodness of the casserole—plus, it keeps the meal fun and exciting!
Presentation Tips for an Appealing Meal
Make your meal look as good as it tastes with these simple tips:
- Garnish: Sprinkle fresh herbs like parsley or chives on top for a pop of color.
- Serve in Individual Dishes: Portioning into ramekins adds a touch of elegance.
- Add a Crunchy Topping: A sprinkle of crushed pork rinds or almond flour adds texture.
These small touches can make your meal more inviting and enjoyable.
Storing and Reheating Leftovers
If you have leftovers (lucky you!), here’s how to keep them tasty:
- Storage: Place leftovers in an airtight container and refrigerate for up to 3 days.
- Reheating: Warm in the oven at 350°F until heated through, or use the microwave for a quick fix.
- Freezing: For longer storage, freeze portions for up to a month. Thaw in the fridge before reheating.
Proper storage and reheating ensure your keto tuna casserole remains delicious even days later.
If you love meal prepping, be sure to check out this Million Dollar Chicken Casserole. It’s another rich, creamy, and satisfying low-carb meal that’s just as easy to make ahead and reheat whenever hunger strikes.
Frequently Asked Questions About Keto Tuna Casserole
Everyone has a few questions before diving into a new recipe, especially when it comes to keto tuna casserole. Below, we tackle some of the most common concerns to help you get the best results.
Can I Use Fresh Tuna Instead of Canned?
Absolutely! If you prefer fresh fish over canned, go for it. Just cook and flake fresh tuna before mixing it into the casserole. Keep in mind that canned tuna has a saltier, firmer texture, so if you’re using fresh, you might need to add a pinch of salt to balance the flavor.
How Do I Prevent the Casserole from Becoming Watery?
A soggy casserole is a no-go! Here are some ways to keep it from getting too watery:
- Drain the tuna well – Press out as much liquid as possible.
- Pat dry any veggies – Zucchini and spaghetti squash hold a lot of moisture, so blot them before adding.
- Use full-fat dairy – Low-fat alternatives tend to release water when baked.
Is It Possible to Make the Casserole Ahead of Time?
Yes! This dish is meal-prep friendly. Assemble the casserole, cover it tightly, and refrigerate for up to 24 hours before baking. When you’re ready, just pop it in the oven—no extra prep needed!
Nutritional Information and Health Considerations
If you’re watching your macros or have dietary concerns, here’s a breakdown of what’s in each serving of this keto tuna casserole.
Caloric and Macronutrient Breakdown
Here’s what you’re getting per serving (based on six servings):
- Calories: ~350
- Protein: 30g
- Fat: 25g
- Net Carbs: 4g
These macros make this dish perfect for keto, giving you high protein, healthy fats, and minimal carbs to keep you full and fueled.
Allergen Information
Since this recipe contains dairy and fish, those with allergies should take note. If you’re lactose intolerant, simply swap dairy-free cheese and coconut cream for the heavy cream and cheese.
Adjusting the Recipe for Specific Dietary Needs
- For More Protein: Add extra tuna or shredded chicken.
- For Fewer Calories: Use less cheese or swap out heavy cream for Greek yogurt.
- For a Dairy-Free Version: Go for coconut-based alternatives and nutritional yeast instead of cheese.
This recipe is highly customizable, making it easy to adjust based on your needs while still keeping it delicious and keto-friendly.
Conclusion and Encouragement to Try the Recipe
There you have it! This keto tuna casserole is creamy, cheesy, and packed with flavor—all without the unnecessary carbs. Whether you’re making it for a quick weeknight dinner or prepping ahead for easy meals, this dish is a winner.
The best part? It’s super flexible! Add your favorite low-carb veggies, swap out ingredients to fit your diet, or try different protein options. The possibilities are endless.
So go ahead, give it a shot! Once you try it, you’ll wonder why you didn’t make it sooner. And hey—if you do, let me know how it turned out!
Table of Contents
Keto Tuna Casserole
- Total Time: 35 minutes
- Yield: 4–6 servings 1x
Description
Creamy, cheesy, and packed with protein, this keto tuna casserole is the ultimate comfort food for anyone following a low-carb diet. Made with simple ingredients and ready in under an hour, it’s perfect for weeknight dinners or meal prep. Enjoy a delicious, low-carb twist on a classic dish!
Ingredients
- 2 cans (5 oz each) tuna (drained)
- 2 cups low-carb noodles (e.g., zucchini noodles, spaghetti squash, or shirataki noodles)
- ½ cup heavy cream
- 4 oz cream cheese (softened)
- 1 ½ cups shredded cheddar cheese
- ¼ cup Parmesan cheese
- 1 tsp garlic powder
- 1 tsp onion powder
- Salt and black pepper (to taste)
- ½ cup crushed pork rinds (optional, for topping)
- 1 cup keto-friendly veggies (e.g., broccoli, spinach, or mushrooms)
Instructions
- Preheat the oven to 375°F (190°C) and grease a baking dish.
- Prepare the noodles: pat zucchini or shirataki noodles dry to remove excess moisture.
- In a mixing bowl, whisk together cream cheese, heavy cream, garlic powder, onion powder, salt, and pepper until smooth.
- Stir in the drained tuna, shredded cheese, and veggies (if using). Mix well and fold in the prepared noodles.
- Pour the mixture into the greased baking dish and top with Parmesan cheese and crushed pork rinds for a crispy finish.
- Bake for 25 minutes, or until the top is golden and bubbly.
- Let the casserole cool for a few minutes before serving. Enjoy!
Notes
- To prevent the casserole from becoming watery, ensure all veggies and noodles are thoroughly dried before mixing.
- For a dairy-free version, substitute heavy cream with coconut cream and use dairy-free cheese.
- Add crushed pork rinds or almond flour as a crispy topping for extra texture.
- Prep Time: 10 minutes
- Cook Time: 25 minutes
- Category: Main Course
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: ~1 cup
- Calories: 350
- Sugar: 2g
- Sodium: 750mg
- Fat: 25g
- Saturated Fat: 12g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 4g
- Fiber: 1g
- Protein: 30g
- Cholesterol: 80mg
Keywords: keto tuna casserole, low-carb tuna casserole, creamy casserole recipe, healthy casserole, easy keto dinner
