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Keto Tuna Casserole {Ready in About 20 Minutes!}

This Keto Tuna Casserole is comforting, warming, and so easy to make. It’s tuna noodle style with the help of keto noodles and is ready in just over 20 minutes!

overhead view of keto tuna casserole in a casserole dish

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This Keto Tuna Noodle Casserole will remind you of classic tuna noodle casserole with only a fraction of the carbs! Thanks to keto noodles, it really does have a noodle base just like the original. The noodles and tuna are tossed in a creamy, cheesy sauce alongside just a small amount of peas and carrots – not enough to boost the carb count, but just enough to give it that classic tuna noodle casserole flavor.

Keto Dinner recipes are some of the most important recipes you can add to your keto meals. Whether it is keto soup, keto pizza, or keto casserole recipes, the right recipes can make all the difference. At Forget Sugar we strive on making easy keto recipes that can be made often and are delicious!

Keto Tuna Casserole

…and why you’ll love it!

  • It’s ready in just over 20 minutes, perfect for those busy weeknights.
  • It may be a keto recipe, but it has all the flavors of classic tuna noodle casserole.
  • Each serving is packed with 17g protein.
  • It’s super low-carb with only 3g net carbs per serving!

Ingredients Needed to Make This Easy Low Carb Tuna Casserole

Ingredient quantities for this low carb tuna casserole recipe are located in the recipe card at the end of the post.

  • Olive oil
  • Carrots
  • Almond flour
  • Unsweetened almond milk
  • Heavy whipping cream
  • Dijon mustard
  • Garlic powder
  • Salt and pepper
  • Cayenne pepper (optional)
  • Cream cheese
  • Frozen peas
  • Canned tuna
  • Fettuccine shirataki noodles
  • Shredded Parmesan cheese
  • Pork rinds

How to Make Gluten Free Tuna Casserole {Quick Overview}

This is just a quick overview of some of the steps involved in making the gluten free tuna casserole with noodles. For the recipe in detail, including exact measurements used at each step, scroll to the recipe card at the end of the post.

In a large skillet, cook carrots in olive oil, then add almond flour.

carrots in olive oil in a skillet

Then add almond milk, heavy whipping cream, Dijon, garlic powder, salt, pepper, and cayenne pepper. Add to skillet, stirring constantly. Add cream cheese and melt into mixture. Cook until mixture thickens slightly.

skillet containing keto tuna noodle casserole mixture

Add peas, tuna, noodles, and 1/2 cup of the Parmesan cheese.

TIP: Rinse, rinse, rinse those shirataki noodles! They’re a bit stinky when you initially remove them from the package, so you need to rinse until they have little to no odor.

skillet containing tuna, noodles, and peas

Stir to combine, then add to a casserole dish and top with remaining Parmesan cheese and finely crushed pork rinds. Bake for 10 minutes until you get…

overhead view of keto tuna casserole on top of a blue towel


Where to Buy Fettucine Shirataki Noodles

You may be able to find the popular brand Miracle Noodle at your local grocery or health food store. Or, you can buy it on Amazon:

Miracle Noodle Shirataki Noodles

I personally buy the Wonder Noodles brand, which you can get at an awesome price via Thrive Market (it’s their in-house brand). Thrive Market is pretty much like the Costco of high-quality natural foods! Get a MASSIVE discount by using the links below — you’ll get up to a $24 free gift on your first order (which makes their already super low prices even lower!). I’ve been using Thrive Market for over two years and am a HUGE huge fan!

Get net carb-free Wonder Noodles at an awesome price!

Or, you can read my full Thrive Market review here!

If you pick up some extra bags of shirataki noodles, you’ll want to use them in my Keto Chicken Alfredo with Broccoli recipe too. Also, try our popular Keto Jalapeno Popper Chicken Casserole.

More Keto Side Dishes

Serve this dish with some of these keto side dishes:

Can I Eat Tuna Casserole on the Keto Diet?

You can eat tuna casserole on the keto diet by making a low carb or keto-friendly recipe. Traditional tuna casserole may have heavy carb egg noodles, potato chips, cream of mushroom soup, and breadcrumbs, and all must be avoided on the keto diet. You must use healthy low carb substitutes when you make a tuna casserole on the keto diet.

How Do I Make Tuna Casserole Keto-Friendly?

Tuna casserole can be made keto-friendly by using low carb substitutes for the heavy carb ingredients. Instead of using egg noodles you can use low carb shirataki noodles, and instead of using potato chips or bread crumbs you can use crushed pork rinds. With each substitute you make your tuna casserole becomes healthier for you on a low carb diet and on the keto diet.

Nutrition Facts for Easy Keto Tuna Bake

Per serving:

  • 300 calories
  • 24g fat
  • 17g protein
  • 3g net carbs
closeup of spoon with keto tuna casserole over a casserole dish

More Keto Casserole Recipes

Try more of our delicious and easy to make low carb casserole recipes the whole family will enjoy!

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overhead view of keto tuna casserole in a casserole dish

Keto Tuna Casserole

This Keto Tuna Casserole is comforting, warming, and so easy to make. It's tuna noodle style with the help of keto noodles and is ready in just over 20 minutes!
5 from 7 votes
Print Pin Rate
Course: Main Course
Cuisine: American, Western
Keyword: gluten free tuna casserole, keto tuna bake, keto tuna casserole, keto tuna noodle casserole, low carb tuna casserole
Prep Time: 5 minutes
Cook Time: 18 minutes
Total Time: 23 minutes
Servings: 6
Calories: 300kcal


  • 2 tbsp olive oil
  • 1/4 cup diced carrots
  • 2 tbsp almond flour
  • 3/4 cup unsweetened almond milk
  • 1/2 cup heavy whipping cream
  • 2 tbsp Dijon mustard
  • 1/2 tsp garlic powder
  • 1 tsp salt
  • 1/2 tsp pepper
  • 1/8 tsp cayenne pepper optional
  • 4 oz cream cheese
  • 1/4 cup frozen peas
  • 2 5-oz cans tuna fish
  • 2 7-oz packages fettuccine shirataki noodles drained and thoroughly rinsed
  • 3/4 cup shredded Parmesan cheese divided
  • 1/4 cup finely crushed pork rinds


  • Preheat oven to 425 F.
  • Heat oil in a large nonstick skillet over medium-high heat. Adds carrots and cook for 3 minutes. Add almond flour, stirring to combine. Cook for an extra 1-2 minutes.
  • Combine almond milk, heavy whipping cream, Dijon, garlic powder, salt, pepper, and cayenne pepper. Add to skillet, stirring constantly. Add cream cheese and melt into mixture. Cook until mixture thickens slightly.
  • Add peas, tuna, noodles, and 1/2 cup Parmesan cheese. Stir well to combine.
  • Transfer mixture to a casserole dish. Top with remaining 1/4 cup Parmesan cheese and pork rinds.
  • Bake at 425 F for 10 minutes or until mixture is bubbly and pork rinds are golden.


Keto Casseroles

Other people who made this recipes also made some of these keto casserole recipes:
Nutrition Facts
Keto Tuna Casserole
Amount Per Serving
Calories 300 Calories from Fat 216
% Daily Value*
Fat 24g37%
Saturated Fat 11g69%
Cholesterol 75mg25%
Sodium 896mg39%
Potassium 176mg5%
Carbohydrates 4g1%
Fiber 1g4%
Sugar 1g1%
Protein 17g34%
Vitamin A 1624IU32%
Vitamin C 3mg4%
Calcium 235mg24%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.

Nutrition Disclaimer

Nutrition facts are included as a courtesy only. They are accurate to the best of our knowledge based on the ingredients and brands used, but their accuracy is not guaranteed. If applicable, sugar alcohols have already been removed from the total carb count.

More Keto Family Meals

Try any one of these low carb family meals that everyone will enjoy!


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Recipe Rating

  • I’m surprised you didn’t mention rinsing Shirataki noodles, & also mentioning that to get rid of some of the springy texture pan frying noodles in a hot dry pan till the water is gone. I love and have made many of your recipes.

    • Hi Anne, Thank you for your comment and kind words about my recipes! 🙂 I just updated the post; I usually mention the rinsing part, but forgot to in this recipe. I have not yet tried the frying tip but have heard of it – thank you for the reminder! I’m looking forward to trying it.

  • 5 stars
    Fantastic! I recommend cutting the fettuccine into shorter lengths. Leaving them soooo long makes it very difficult to divide into individual servings.
    Husband loved it!

  • 5 stars
    I made this Keto Tuna Casserole last night and was pleased. It was very quick to make and the entire family liked it including my fussy 4 year old son. I like recipes that will work with my Keto diet and satisfy the rest of my non-Keto family. The crushed pork rinds on top add to the appeal. I never tried the shirataki noodles before so I am glad to have another ingredient that I can use on my diet.

  • 5 stars
    This was super easy to make and delicious! The shirataki noodles are a wonderful addition to my keto diet. Thank you for the introduction.

  • 5 stars
    This recipe for Keto tuna casserole turned out so well! It is simple to make and is a nice, comforting, creamy meal that the entire family liked. With easy recipes like this one, it is simple to stay Keto.

  • 5 stars
    Oh my goodness this is Fantastic!! My mom made one when I was little and I thought that was good…not Keto.
    This surpasses hers by miles! Thank goodness my husband didn’t like it so I have it all to myself!!

  • 5 stars
    Your Recipies are fantastic, making the tuna noodle casserole today. Thank you. Keep sending there great r3cipies.

Welcome! I’m Jessica.

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