Growing up, I ate tuna casserole often. It’s probably one of my favorite comfort dinners during the winter season and thankfully it’s also super easy to keto-fy!
Now, tuna casserole is usually made with some carby vegetables such as peas. So for this recipe, I swapped those out for some keto-friendly veggies like mushrooms and a small amount of carrots. Instead of pasta noodles I used shirataki noodles, but zucchini keto noodles are also a great alternative.
The great thing about this recipe it is incredibly easy to make and preparation time takes almost no time at all. Later on, you can freeze this casserole and save it for later or take it to work!
Yields 6 servings of Keto Tuna Casserole
The Preparation
- 1 tablespoon butter
- 1/4 cup carrot, chopped
- 1/4 cup cremini mushrooms, chopped
- 1/4 cup green onion, chopped
- 1 cup heavy whipping cream
- 1/4 teaspoon xanthan gum
- 678 grams shirataki noodles
- 3/4 cup cheddar cheese, shredded
- 146 grams canned tuna, drained
- salt and pepper, to taste
- 2 tablespoons almond flour
The Execution
1. Melt your butter in a deep pot on medium.
2. Add in the green onions, mushrooms, and carrots.
3. Saute the veggies for 3-5 minutes. Sprinkle your xanthan gum over the vegetables.
4. Quickly add in your cream and stir. It should start thickening immediately, but keep on the heat until it starts to bubble.
5. Place your shirataki noodles in a casserole dish.
6. Stir the cream mixture into the noodles.
7. Mix in your cheddar cheese and flaked tuna.
8. Optionally, top your casserole with almond flour.
9. Bake at 350°F for 35 minutes.
This makes a total of 6 servings of Keto Tuna Casserole. Each serving comes out to be 270 calories, 23.3g fats, 2.5g net carbs, and 11.3g protein.
| NUTRITION | CALORIES | FAT | CARBS | FIBER | NET CARBS | PROTEIN |
| 1 tablespoon butter | 102 | 11.5 | 0 | 0 | 0 | 0.1 |
| 1/4 cup carrot | 14 | 0.1 | 3.2 | 1.2 | 2 | 0.3 |
| 1/4 cup cremini mushrooms | 6 | 0 | 0.8 | 0.1 | 0.7 | 0.5 |
| 1/4 cup green onion | 8 | 0.1 | 1.8 | 0.7 | 1.2 | 0.5 |
| 1 cup heavy whipping cream | 809 | 85.9 | 6.5 | 0 | 6.5 | 6.8 |
| 1/4 teaspoon xanthan gum | 4 | 0 | 0.9 | 0.9 | 0 | 0 |
| 678 gram shirataki noodles | 41 | 0 | 20.3 | 19.7 | 0.7 | 1.4 |
| 3/4 cup cheddar cheese | 371 | 30.6 | 2.8 | 0 | 2.8 | 21 |
| 146 gram canned tuna | 187 | 4.3 | 0 | 0 | 0 | 34.5 |
| — salt and pepper | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 tablespoon almond flour | 81 | 7 | 3.1 | 1.8 | 1.3 | 2.9 |
| Totals | 1622 | 139.5 | 39.6 | 24.3 | 15.2 | 67.9 |
| Per Serving (/6) | 270 | 23.2 | 6.6 | 4.1 | 2.5 | 11.3 |
Keto Tuna Casserole
Ingredients
- 1 tablespoon butter
- ¼ cup carrot chopped
- ¼ cup cremini mushrooms chopped
- ¼ cup green onion chopped
- 1 cup heavy whipping cream
- ¼ teaspoon xanthan gum
- 678 gram shirataki noodles
- ¾ cup cheddar cheese shredded
- 146 gram canned tuna drained
- salt and pepper to taste
- 2 tablespoon almond flour
Instructions
- Preheat oven to 350F. Melt the butter in a deep pot on medium.
- Add in the green onions, mushrooms, and carrots.
- Saute the veggies for 3-5 minutes. Sprinkle xanthan gum over the vegetables.
- Quickly add in the cream and stir. It should start thickening immediately, but continue heating until it starts to bubble.
- Drain shirataki noodles and rinse very well. Dry with paper towel. Place the shirataki noodles in a casserole dish.
- Stir the cream mixture into the noodles.
- Mix in the cheddar cheese and flaked tuna.
- Top the casserole with almond flour.
- Bake for 35 minutes.
Do you dry fry your noodles before using them?
No, they’re just used as-is 🙂
What about zucchini noodles? Should they be cooked first?
I would cook them first and drain any excess water. 🙂
Gosh! Thanks for the reply! I did saute them in butter and it came out well. That is quite a tasty recipe! Thanks for sharing!
What is the serving size? I wish more recipes would say what size a serving is instead of just saying how many servings a recipe makes.
All of our servings and serving sizes are variable and are just usually based on the calorie values that the final recipe makes. The serving sizes can and should be changed to suit your macros.
What is your favorite brand of shirataki noodles?
Pretty much any will work – most are the same ingredients.
I thought we were supposed to avoid carrots???
It ends up being about 2 teaspoons worth of carrot per serving.
Recipe sounds tasty, but 1 can of tuna for 6 servings???? Crazy. If I’m eating a dish with that many calories/fat/etc, it needs way more protein to be worth it.
I think this casserole is small, so it might work better as a side dish for some people. Perhaps served with some protein is the way to go. 🙂
It might not be relevant to your macros, but I added a second can of tuna and reduced it to 4 servings:
Calories 493
Fat 32.25
Net Carbs 6
Protein 34
Where can we get shirataki noodles?
Great recipe! Made it last night and I’m sad I didn’t double it. Never heard of shirataki noodles until now, but they are a really great noodle alternative. Thank you!
I made this last week and really enjoyed it (all week long). Like many of the recipes here, it has a nice balance of feeling both filling and indulgent, but healthy too. A winner that I will make regularly. Really appreciate your info and content. Thank you.
Hey, looking at cooking this one – I love a tuna bake!!
Just wondering if you mean “3 packages noodles = 226 g” or if you mean “3 packages (226 g) noodles = 678g”?
678g! 2 pages of noodles that are 226g each. 🙂
shirataki noodles its not 90 kcal !! i checked every where
can u tell me how?!
i found it 20 kcal 2g protein and 0.99 fat and 5.99 carbs (fiber 4.1) per 226
so 60 kcal per 678g (3 packages) 6 protein, 2.97 fat, 18.97 carbs, 12.3 fiber
this figures from usda database, which i noticed you are using it in ur calculation
thanks and regards,
waiting to hear from you soon
This specific recipe was made with the “Nasoya” brand which has some potato starch and things like that added into the noodle. Typically shiritaki noodles are low or no calorie, but these specific ones have 30 calories per bag.
Have you thought of trying this with spaghetti squash? I don’t really care for shirataki noodles but I’m afraid zucchini noodles would release too much liquid.
I’m sure that it could work with spaghetti squash, but it would change the overall taste and increase the carb counts – so just keep an eye on them.
I didn’t have shirataki noodles and made this with broccoli instead. Turned out great!
thank you
Sounds like a delicious twist – glad you enjoyed it!
Is there a replacement to the Xanthan Gum? I’m really digging this
Guar gum (using double the amount) would do the job. Otherwise, any thickener would work as long as it’s low carb.
This was delish! I made this in a skillet substituting the noodles for riced broccoli.
Hi! What size casserole dish do you suggest? It looks like an 8×8 in the photo… Thanks in advance!
8×8 should work fine!