Keto Tuna Noodle Casserole

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Make this deliciously creamy Keto Tuna Noodle Casserole with homemade pasta! An easy dinner that is grain-free, gluten-free, and low-carb.

If you like tuna, you will love this keto casserole! It has a creamy base that’s made with sour cream and heavy cream, and combined with my homemade keto pasta. Don’t worry, the noodles are SUPER easy and fast to make. The casserole is topped off with Gouda cheese (or cheddar) and tastes great with a side salad or just by itself. So yum!

Is this tuna casserole really keto friendly?

Keto Tuna Noodle Casserole hot out of the oven.

You bet it is! While other tuna casseroles are high carb due to the addition of wheat-based pasta, canned soup, and sometimes even potato chips (I never quite got why that is a common ingredient in American casseroles), my version is healthy and low-carb.

The pasta for this casserole is nearly ZERO net carbs, as it’s only made with eggs, olive oil, mozzarella, and psyllium husk! I made the creamy base completely from scratch, without the addition of any starches or canned soups. If you are watching your carb intake, you can feel safe with this dish for sure!

Tips for making a low-carb Tuna Noodle Casserole!

Cut up noodles for Keto Tuna Noodle Casserole.

Pasta. You will need to make one batch of my Homemade Keto Pasta. Follow the recipe’s instructions to make the batter, and line a baking sheet with parchment paper and pour over the batter. Cover with another large piece of parchment paper, and now use your hands to spread out the batter into a thin rectangle. For this casserole, I like to use thin noodles, so I use a large baking sheet with dimensions 18×13 inches. You can also use a smaller baking sheet (with minimum dimensions of 14×12 inches), you will just end up with slightly fewer and thicker noodles.

After baking the pasta, cut up the pasta sheet into small, short noodles (kind of like short fettuccini or egg noodles). You can use a knife or pizza cutter.

Tuna. I highly recommend using canned tuna that is tested for mercury and sustainably caught (i.e. pole and line caught). I prefer using tuna that is canned in a healthy oil, like avocado oil or olive oil. Make sure to drain the tuna before you use it.

Salt. Be conservative with salt. Canned tuna and Gouda cheese (or cheddar cheese) are salty ingredients, so it’s easy to oversalt this casserole. I found that a dash of salt is plenty for this recipe. Salt to taste.

Enjoy this creamy Keto Tuna Casserole for dinner tonight!

Keto Tuna Noodle Casserole garnished with parsley.

It would be great if you left feedback on this recipe by commenting and hitting the 5-star rating button. I’d love to hear from you!

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Keto Brown Sugar BBQ Ribs

Keto Tuna Noodle Casserole hot out of the oven.

Keto Tuna Noodle Casserole

Make this deliciously creamy Keto Tuna Noodle Casserole with homemade pasta! An easy dinner that is grain-free, gluten-free, and low-carb.
5 from 1 vote
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Main Course
Cuisine American, German, Keto
Servings 6 servings
Calories 525 kcal

Ingredients
  

  • 1 batch Homemade Keto Pasta
  • 2 cans tuna canned in avocado or olive oil, well drained
  • cups sour cream full-fat
  • 1 cup heavy cream
  • ½ yellow onion chopped
  • salt to taste, see notes
  • pepper to taste
  • cups Gouda cheese shredded, or cheddar cheese
  • scallions or parsley optional, for garnish

Instructions
 

  • Prepare and bake Homemade Keto Pasta according to instructions. Slice into short, thin strips (kind of like short fettuccini). Set aside.
  • Preheat oven to 375 °F.
  • In a large bowl, whisk together drained tuna, sour cream, heavy cream, and chopped onions. Salt and pepper to taste. Stir in noodles.
  • Pour casserole mix into a large (glass or ceramic) casserole dish. Cover with shredded cheese. Bake for 30-35 minutes, until cheese is bubbly.
  • Garnish with scallions or parsley if desired. Store leftovers in a covered container in your fridge for one week.

Notes

  1. Pasta. For this casserole, I like to use thin noodles, so I use a large baking sheet with dimension 18×13 inches for spreading out the pasta batter. You can also use a smaller baking sheet (with minimum dimensions of 14×12 inches), you will just end up with slightly fewer and thicker noodles.
  2. Tuna. I highly recommend using canned tuna that is tested for mercury and sustainably caught (i.e. pole and line caught). I prefer using tuna that is canned in a healthy oil, like avocado oil or olive oil. Make sure to drain the tuna before you use it.
  3. Salt. Be conservative with salt. Canned tuna and Gouda cheese (or cheddar cheese) are salty ingredients, so it’s easy to oversalt this casserole. I found that a dash of salt is plenty for this recipe. Salt to taste.

Nutrition

Serving: 1servingCalories: 525kcalCarbohydrates: 5gProtein: 26gFat: 45gFiber: 1gSugar: 3g
Keyword keto casserole, keto dinner, keto pasta dinner
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2 Comments

  1. 5 stars
    My family and I really enjoyed this tuna casserole! Yummy, healthy, easy, and made with simple ingredients I already had on hand! The noodles worked great!

    • Amy, so happy to hear the casserole worked for you and your family! Glad you didn’t shy away from trying the noodles too!

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