Keto Tuna Casserole Recipe: A Flavorful Low-carb Meal!

Keto Tuna Casserole Recipe A Flavorful Low-carb Meal!
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Keto Tuna Casserole Recipe
This delicious and filling keto tuna casserole has no noodles, but it has lots of flavor! Plus it's so easy to make.

Hey y’all, it’s Anne here from Beyond the Bayou Blog! As someone who’s spent years working in restaurants, I know how tough it can be to find tasty keto-friendly dishes. That’s why I’m excited to share this keto tuna casserole recipe with you today.

Like a lot of you, I’ve struggled with my weight and have tried different diets over the years. The keto diet has really worked for me in keeping my cravings under control and helping me shed some pounds. But it can be hard to stick to with all the tempting carb-filled foods out there!

This tuna casserole is one of my go-to keto meals. It’s hearty, filling, and just so darn good. Best of all, it’s easy to make with ingredients you likely already have in your kitchen. No fancy stuff required! Whether you’re keto or just looking for a yummy, comforting casserole, this recipe is sure to hit the spot.

Is This Tuna Casserole Really Keto-friendly?

You’re probably wondering if this tuna casserole fits the keto bill, right? Well, let me tell you, it absolutely does! Unlike those carb-loaded versions with pasta, canned soup, and even potato chips (seriously, who came up with that?), my recipe is all about keeping it healthy and low-carb.

Here’s the lowdown: the pasta in this casserole has almost ZERO net carbs. How? It’s made with eggs, olive oil, mozzarella, and psyllium husk. Plus, I whipped up the creamy base from scratch, no starchy additives or canned soups in sight.

So, if you’re keeping an eye on your carb intake, rest assured, this dish is totally keto-friendly. Enjoy guilt-free!

Overview: How To Make Keto Tuna Casserole Recipe?

Overview How To Make Keto Tuna Casserole Recipe

Get ready to indulge in a childhood classic with a keto twist – it’s time for Quick Keto Tuna Casserole, a revamped version of Mom’s Tuna Bake. With just 15 minutes of prep time and 30 minutes in the oven, you’ll have a satisfying entree ready to serve.

To kick things off, preheat your oven to 350 degrees. While it’s heating up, grab a 9″ x 9″ or 9″ x 11″ oven-proof pan or a small casserole bowl, and give it a quick spritz with avocado oil to prevent sticking.

Now, let’s talk ingredients. You’ll need two cans of Albacore Tuna (5.5 oz each), along with chopped baby carrots, celery, onion, and frozen petite peas. Don’t forget the flavor boosters: lemon pepper seasoning and shredded Colby jack or cheddar cheese. For the creamy binder, mix together an egg, mayonnaise, and sour cream in a medium bowl, then toss in the tuna and veggies.

Once everything’s nicely combined, pour the mixture into your prepared pan and sprinkle the remaining cheese on top. Pop it in the oven and let it bake for about 30 minutes, until the cheese is melted and the casserole is hot and bubbly.

When it’s done, cut it into four servings and dig in while it’s still warm. It’s a hearty, keto-friendly meal that’ll satisfy your cravings without derailing your low-carb lifestyle. Enjoy!

Try More Casserole Recipe!

Keto Tuna Casserole Recipe A Flavorful Low-carb Meal!

Keto Tuna Casserole Recipe

This delicious and filling keto tuna casserole has no noodles, but it has lots of flavor! Plus it's so easy to make.
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Course: Main Course
Cuisine: American
Prep Time: 15 minutes
Cook Time: 15 minutes
Total Time: 30 minutes
Calories: 295kcal
Author: Anne Carter
Servings: 2


  • Mixing Bowl
  • Spatula
  • Knife
  • Can Opener
  • Measuring Cups


  • 2 cans Albacore Tuna 5.5 oz each
  • 5 baby carrots chopped
  • 1/4 cup petite peas frozen
  • 1 lg stalk celery chopped
  • 2 tbsp chopped onion chopped finely
  • 1 tsp Lemon pepper seasoning
  • 1 cup shredded Colbyjack cheese or shredded cheddar
  • 1 lg egg
  • 1/4 cup mayonnaise
  • 1/4 cup sour cream


  • Preheat oven to 350°F.
  • Grease a 9″ x 9″ or 9″ x 11″ oven-proof pan or small casserole bowl with avocado oil.
  • Chop onion, celery, and carrots.
  • In a medium bowl, mix tuna, mayonnaise, sour cream, egg, lemon pepper seasoning, chopped vegetables, peas, and half of the cheese.
  • Pour mixture into prepared pan and sprinkle remaining cheese on top.
  • Bake for 30 minutes or until cheese is melted and casserole is hot and bubbly.
  • Cut into 4 servings and serve warm.


Calories: 295kcal | Carbohydrates: 3.4g | Protein: 23.4g | Fat: 20g | Cholesterol: 80.4mg | Sodium: 522mg | Fiber: 0.1g
Keyword Best Keto Tuna Casserole Recipe, Easy Keto Tuna Casserole Recipe, Keto Tuna Casserole Recipe

Tips For Making Low-carb Tuna Casserole 

  • Crunchy Keto Topping: Craving that satisfying crunch without loading up on carbs? Try scattering crushed pork rinds on top before baking. It’s a keto-friendly move that keeps those net carbs in check while adding that perfect crispy texture.
  • Chicken Swap: Feeling adventurous? Swap out the tuna for some shredded chicken. It’s a tasty twist that brings a whole new dimension to the dish.
  • Almond Milk Alert: When you’re pouring in the milk, make sure it’s unsweetened almond milk. Skip the flavored or sweetened stuff to keep your casserole low-carb and on point.

What To Serve With Tuna Casserole?

What To Serve With Tuna Casserole

Variations You Must Try!

  • Switch up the Tuna: Instead of the regular tuna in water, go for tuna in olive oil. Trust me, it adds a whole new level of yum!
  • Swap the Sauce: Don’t feel like mayo? No problem! Give sour cream a shot instead. Both are great, but hey, I’m team mayo all the way!
  • Add Some Dill: Want to kick up the flavor? Throw in some dill! It’s like a little burst of freshness in every bite.
  • Cheese Choices: Out of Gruyere? No sweat! Reach for sharp cheddar or provolone instead. And if you’re feeling adventurous, smoked gouda is a winner too!

Can You Freeze This Casserole?

Yes. Once completely cool, you can wrap the baking dish in plastic wrap followed by a layer of foil. Freeze it for up to three months. Thaw it in the fridge.

Why Is My Casserole Dry?

This casserole can become dry if the ratio of tuna to creamy ingredients (mayonnaise and mustard) is too high.

I find that ⅓ cup of mayo works well, but depending on the brand of tuna you use, you might need to increase it and use up to ½ cup.

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