Keto Tuna Casserole Recipe (0g Carbs)

This keto tuna casserole is the proper wealthy, creamy, and hearty consolation meals for while you’re pressed on time. It’s easy and flavorful, all whereas utilizing a number of elements you in all probability have already got at dwelling.

Freshly made tuna casserole with pork rinds, celery, and carrots on a black plate.

Benefits to Tuna

Tuna like most fish, have excessive ranges of omega three’s(1). The commonplace American weight loss program is excessive in omega 6’s from issues like plant oils which may trigger irritation. A weight loss program wealthy in omega three’s might help to counter steadiness a few of these omega 6’s and cut back general irritation.

Picking a Tuna

Including tuna in our weight loss program is nice, however what tuna do you have to choose? There are tons of tunas in the marketplace, so we made it simple and broke down the very best canned tuna to purchase.

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Packed in Water or Oil?

For starters irrespective of which tuna you select it ought to be packed in water. The one exception is tuna that’s packed in olive oil. However, most canned tuna is packed in cottonseed, sunflower, or soybean oil. These oils are excessive in omega 6’s and negate all the advantages you receive by consuming fish.

Albacore or Chunk Light?

Tuna is generally an enormous fish which means it eats extra mercury throughout its lifetime. If you will discover tuna marked chunk gentle or skipjack you might be higher shopping for these as a result of they’re a smaller tuna specie(2). If you don’t eat tuna usually you might be in all probability effective consuming albacore, however if you’re making an attempt to observe your heavy steel consumption it’s one thing to think about.

Adding Noodles to Low Carb Tuna Casserole

This keto tuna casserole is cheese stuffed and filled with taste, however skips the noodles to maintain carbs low. This recipe is zero web carbs which is right for a keto weight loss program, but when desired leaves room for a keto noodle substitute. Some of our favorites are zucchini noodles or black bean noodles which can be eight web carbs per 2oz serving measurement. When coated with tuna and cheese you received’t even be capable to inform they have been made with beans!

Tuna casserole being served with a black metal spoon

Tips for Making Tuna Casserole Keto

If you’re working into points whereas making our recipes or simply wish to know find out how to make this tuna casserole higher, take a look at our casserole ideas.

Drain the Tuna

By far the #1 tip to creating any tuna casserole is draining the tuna meat. Excess water or oil will end in a runny recipe that doesn’t maintain its creamy cheese base. While it solely takes 20 minutes whole time, it’s possible you’ll discover the recipe takes further lengthy to bake all that extra water off.

Substitute Tuna for Canned or Pulled Chicken

This is a excessive protein recipe clocking in at 15g protein and 14g fats. If you don’t have canned tuna or don’t like canned tuna, the following most suitable choice goes to be canned rooster. The whole time of 20 minutes received’t change, however your recipe can have extra of a scrumptious cheese and rooster really feel to it. This can also be a terrific possibility for these with choosy youngsters, as a result of in case you combine half rooster half tuna they in all probability received’t even style the fish!

Just in Time for Lent

Lent 2021 is simply across the nook and earlier than you understand it, it is going to be fish Fridays! Just as a result of you’ll be able to’t eat conventional meat doesn’t imply you shouldn’t eat low carb keto recipes. This gluten free keto tuna casserole can be a success on Fridays. It’s so good you received’t even really feel such as you’re lacking out on meat!

Keto Seafood Recipes

There are tons of scrumptious low carb keto fish recipes on the market. Some of our favorites are:

An Ahi Tuna Poke Bowl– Fresh marinated tuna a high greens and cabbage. All topped with sauce, avocado, and sesame seeds. This low carb tuna recipe is bound to spark your new love for poke.

Keto Salmon Curry– A wealthy and creamy dairy free coconut sauce smothered on contemporary salmon. Use it to high zucchini noodles or cauliflower rice for a keto pleasant dinner concept.

Creamy Shrimp Scampi– Another low carb baking dish recipe. Toss a number of elements collectively and this seafood scampi is completed in underneath 20 minutes!

Whether you might be skipping meat for Fridays, a pescatarian way of life, or simply making an attempt to up your seafood consumption, now we have the proper recipe for you. Check out all of the seafood recipes on our weblog to seek out your good dish.

Making Keto Tuna Casserole

This low carb tuna casserole is our childhood consolation meals re-imagined. We eliminated the carbs and as an alternative packed it with wholesome fat to make a wealthy and nutrient dense supply of protein. There are tons of variations and substitutions with this keto tuna casserole you could make, however the primary model is by far our favourite.


This recipe is designed to be tremendous easy as a result of everybody is aware of tuna casserole is one in all those- final minute, throw collectively dishes we all the time remorse not making sufficient! All you will want is a big mixing bowl and a small casserole dish.


Part of what makes consolation meals so good is having the ability to make it each time, with no matter you could have available. To make really good consolation meals, you want a hearty meal, a wealthy base, and a easy however scrumptious idea.

All the ingredients to make tuna casserole in glass and ceramic bowls

The Base

For the bottom of this hearty keto tuna casserole you will want two 5 ozcans of tuna. It is crucial your tuna has had all water drained. A dish with an excessive amount of extra water can be runny and soupy reasonably than wealthy and creamy. To make the creamy factor you want mayo, shredded cheese (we used cheddar however be at liberty to make use of a mix of your favorites), salt/ pepper, and dijon mustard. If you don’t have dijon mustard you should use yellow mustard, however the taste of dijon mustard is way superior.

Additionally you will want your greens of alternative. We used diced onion and celery, however there are a number of different vegetable choices. Some individuals use frozen peas, however the excessive web carb rely per serving measurement (14g) wasn’t price it to us. Instead strive inexperienced beans, broccoli, or cauliflower rice.

The Topping

Finally you will want a nutritious low carb topping. We used crushed pork rinds for a gluten free keto “bread crumb.” We combined this with melted grass fed butter and grated parmesan cheese.

How to Make Keto Tuna Casserole

Now it’s time to place collectively your tasty keto tuna casserole! With zero grams of web carbs per serving this recipe is the proper technique to eat wholesome while you’ve spent all of your carbs for the day. Or simply wish to save them up for our keto chocolate mug cake 😉 .

Begin by preheating the oven to 375°F. Next mix all of the low carb casserole elements in a big mixing bowl. Make positive the tuna has been drained properly earlier than including it in. Break aside the fish to keep away from any huge clumps and to let the mayo coat the whole lot.

Pork rinds, butter, and cheese lined up to be mixed together.

Grease your casserole dish after which switch the tuna combination into it. Once the combination is in your dish, mix all of the topping elements. Sprinkle the topping in your tuna casserole, including further parmesan cheese if desired.

Tuna Casserole being topped with the crushed pork rinds

Bake the casserole for 13-18 minutes till heated during, and the topping is browned. Sprinkle with inexperienced onion and serve with contemporary lower veggies or pork rinds!

Cheesy tuna casserole on a black plate in front of a white casserole dish with leftovers.

Storing and Freezing Keto Casserole

This low carb tuna casserole is a fast and simple to make recipe good for cooking upfront. Try making keto tuna casserole forward of time and freezing it to get pleasure from through the week.


You can preserve this tuna casserole in an hermetic container within the fridge for Four-5 days. Fish goes dangerous sooner than different meats so we actually wouldn’t suggest consuming it previous 5 days within the fridge.


For a make forward meal, put together this tuna casserole like regular after which freeze it. You can do that by freezing it in a plastic wrapped, after which aluminum wrapped baking dish, or an hermetic container.

To reheat, let the casserole defrost within the fridge 24 hours upfront. Remove all plastic wrapping and warmth in an oven protected dish at 350F for 20-30 minutes. Check that the middle is heat earlier than serving.


Can I Use Fresh Tuna? – While contemporary tuna steaks are scrumptious, we would like the tuna to be cooked going into the casserole. It’s finest to have flakey tuna that mixes properly within the sauce. If you wish to use contemporary tuna you would want to cook dinner after which flake all of it. We discover it’s simply simpler to make use of precooked canned tuna.

What Keto Veggies can I add? – If you wish to bulk up this recipe with extra keto vegetable choices, we’ve bought you coated. The conventional tuna casserole route makes use of peas, however one cup has 14 web carbs per serving and eight grams of sugar. Instead strive:

  • Riced Cauliflower- It bulks up the recipe and simply mixes in. Just be sure to cook dinner the cauli rice first so it’s not too moist. Excess water could make the casserole runny.
  • Broccoli florets- They soak up the fats and sauce superbly making them a incredible low carb possibility.
  • Zucchini Noodles- We mentioned this above within the noodles part, however zucchini makes a terrific excessive fiber addition to this casserole supplying you with that tuna noodle really feel.

How Many Carbs are in Keto Tuna Casserole? – Keto tuna casserole has zero grams of web carbs and a strong 14 grams of fats! There is 1 gram of carbs and 1 gram of fiber, aka zero web.

How to Make Keto Tuna Casserole Creamier? – Our keto tuna casserole recipe is wealthy and tacky, however if you’re in search of a creamier selection we’ve bought you coated. Add in half a block of cream cheese and a couple of tbsp of heavy cream to the combination earlier than baking. Cream cheese will add an additional thick and creamy factor to this dish that common cheese and cream can’t. Make positive your cream cheese is softened for simple mixing, and that you just test the carb rely of the cream cheese earlier than cooking. Sometimes the businesses might be tough and sneak in further carbs.

More Casserole Recipes

We love casseroles and we all know most households do too. Casseroles are fast, simple, and excellent to make forward and freeze for a busy week. Try a few of our different quick and engaging casserole recipes this week for dinner!

  • Keto Pizza Casserole– Oooey Gooey Cheesy casserole! With layers of meat, cheese, pepperonis, and olives this casserole actually takes the cake, or pie, or properly… Pizza pie?
  • Loaded Keto Cauliflower Casserole– This recipe is completely scrumptious! There is tons of cheddar cheese, bacon, and cauliflower packed right into a baking dish and cooked within the oven to tender but crispy perfection.
Cheesy keto cauliflower casserole
  • Low Carb Breakfast Casserole– This one’s for all of the breakfast lovers on the market. The recipe is for an egg based mostly casserole with heavy cream, sausage, broccoli, and cheddar cheese. It’s a fast and simple to make breakfast recipe you’ll be able to have all week. It works nice for these on meal plans or dwelling an on the go way of life.

Casseroles are a go to in so many busy households homes. Try a brand new casserole each week and see simply how easy maintaining a healthy diet might be! For extra low carb casseroles take a look at the casserole web page on our weblog

Keto Tuna Casserole

This tuna casserole is a weeknight hit for our household. From begin to end it takes underneath 30 minutes and is filled with fats and protein. We know this dish will preserve us full for hours and feeling nice with none tuna noodle carb coma. Plus even youngsters love this recipe! A tacky gooey casserole is the proper technique to get your youngsters on board with tuna and Omega three’s in seafood as a result of they’ll barely style it. Tip: If your kiddos are further choosy sub the tuna for half tuna half canned rooster so that they style the tuna even much less, however are nonetheless get strong diet!

Tuna Casserole Pin
Keto Tuna casserole finished in a white baking dish

Keto Tuna Casserole

Our Keto Tuna Casserole takes lower than 30 minutes to make and makes use of canned tuna and staple elements you may have available for a straightforward weeknight dinner!


  • Preheat the oven to 375°F and spray a small casserole dish with cooking spray.

  • In a big mixing bowl, mix drained tuna, mayo, cheese, onion, celery, mustard, salt, and pepper. Stir collectively till mixed utilizing a spoon.

  • Transfer the tuna combination into the casserole dish.

  • Combine the bottom pork rinds, parmesan cheese, and butter, and sprinkle the topping over the tuna combination.

  • Bake for 13-18 minutes till heated by means of, and the topping is browned. Sprinkle with inexperienced onion and serve with contemporary lower veggies or pork rinds.

  • Best saved in an air tight container within the fridge as much as 5 days.


Net Carbs: 0g per serving
Yields: 6 servings

Nutrition Facts

Keto Tuna Casserole

Amount Per Serving

Calories 189
Calories from Fat 126

% Daily Value*

Fat 14g22%

Saturated Fat 5g25%

Cholesterol 40mg13%

Sodium 489mg20%

Potassium 111mgthree%

Carbohydrates 1gzero%

Fiber 1gFour%

Sugar 1g1%

Protein 15g30%

Vitamin A 204IUFour%

Vitamin C 1mg1%

Calcium 101mg10%

Iron 1mg6%

* Percent Daily Values are based mostly on a 2000 calorie weight loss program.

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