Keto Reuben Casserole Recipe

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This easy reuben casserole recipe is such a delicious way to eat corned beef. You can get your corned beef right from the deli, or make my pressure cooker corned beef and use the leftovers in this casserole. And since there’s no bread involved, this also happens to be a naturally low carb and keto reuben casserole. With all the sweet, sour, umami, and cheesy flavor in there, you’d never even think about that!

This is one of my favorite casserole recipes – you won’t even miss the bread. But, if you’ve got to have the classic version, I have a full keto reuben sandwich for you too (with bread!).

What Is Reuben Casserole?

This reuben casserole recipe takes all of the flavor of reuben sandwiches and puts it into a super simple casserole form. It’s made with roasted cauliflower, corned beef, sauerkraut, sugar-free Thousand Island dressing, and melty swiss cheese.

How To Make Reuben Casserole

Roast cauliflower. Toss cauliflower with oil, salt, and pepper and roast in the oven, until browned.

Assemble. Spread roasted cauliflower in the bottom of a 9×13 inch baking dish. Top with sauerkraut, Thousand Island dressing, corned beef, and then swiss cheese.

Bake. Bake casserole until heated through and cheese is melted.

Low Carb Reuben Casserole FAQs

Is reuben casserole keto?

It depends on the casserole recipe and what the ingredients are! This reuben casserole uses cauliflower instead of typical casserole carbs like rice or potatoes, so each meal-sized serving has just 4.5 grams net carbs.

Is reuben casserole gluten-free?

Yes, while most reubens are made in sandwich form with bread, this one uses cauliflower, which makes it a great gluten-free meal. You can even serve keto bread on the side and still keep it gluten-free.

Can I use store-bought Thousand Island dressing?

Yes, you can. I highly recommend making my Thousand Island dressing recipe, as it’s super easy, has the best flavor, and no added sugar. But, feel free to use other Thousand Island or Russian dressing if you like – check the nutrition labels if that matters to you.

Storage Instructions

Can you make it ahead?

Yes, you can make this casserole ahead and reheat when ready to serve. Or, you can prep some of the ingredients so that you just need to assemble and bake:

Make corned beef. You can buy it pre-cooked, make smoked corned beef, or Instant Pot corned beef.
Roast cauliflower.
Make Thousand Island dressing.

Refrigerate casserole components until ready to assemble, OR assemble the casserole and store in refrigerator until ready to bake.

Can you freeze reuben casserole?

Yes, you can freeze reuben casserole for 2-3 months. Let thaw in the refrigerator overnight before reheating.

Reheating instructions:

Reheat in the microwave or a 350 degree F oven.

More Cheesy Casserole Recipes

Pesto Chicken Cauliflower Casserole – Just 10 minutes to prep and it’s loaded with veggies, protein, and cheese.
Mexican Ground Beef Casserole – Everyone loves this casserole with traditional Mexican flavors. Have everyone add their own toppings!
Philly Cheesesteak Casserole – Your favorite sandwich in casserole form that comes together in just 30 minutes!
Buffalo Chicken Spaghetti Squash Casserole – Just 6 ingredients to make this simple casserole that has all the buffalo chicken flavors you love.
Keto Big Mac Casserole – Like your favorite burger, but made as a casserole.
Chicken Bacon Ranch Casserole – The most popular casserole on Wholesome Yum. Your whole family will love it!

Tools To Make Baked Reuben Casserole

Tap the links below to see the items used to make this recipe.

Baking Sheet – My go-to for roasting cauliflower, including what I need for this casserole.
9×13-Inch Baking Dish – Layer, bake, and serve this low carb reuben casserole recipe all in the same baking dish.

Easy Reuben Casserole Recipe

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Ingredients

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1 head Cauliflower (cut into bite-sized florets) ▢
3 tbsp Avocado oil ▢
1/2 tsp Sea salt ▢
1/4 tsp Black pepper ▢
1 14-oz can Sauerkraut (drained) ▢
1 cup Sugar-Free Thousand Island Dressing ▢
1 lb Corned beef (chopped into bite-size pieces) ▢
8 oz Swiss cheese slices ▢

Instructions

Tap on the times in the instructions below to start a kitchen timer while you cook.

Preheat the oven to 400 degrees F (204 degrees C).
In a large bowl, toss together the cauliflower, oil, salt and pepper.
Arrange the cauliflower in a single layer on a baking sheet. Roast in the oven for 25-30 minutes, until tender and lightly browned.
When the cauliflower is done roasting, leave the oven on. Transfer the cauliflower to the bottom of a 9x13 baking dish. Top with sauerkraut. Drizzle with thousand island dressing. Add the corned beef, and finally cover the top with Swiss cheese slices.
Place the casserole in the oven for 10-15 minutes, until heated through and cheese is melted.

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Recipe Notes

Serving size: 1/8 entire recipe

Nutrition Facts

Amount per serving. Serving size in recipe notes above.

Calories 421

Fat 36.3g

Protein 17.4g

Total Carbs 6.1g

Net Carbs 4.5g

Fiber 1.6g

Sugar 1.8g

Nutrition facts are provided as a courtesy. Have questions about calculations or why you got a different result? Please see our nutrition policy.

Course: Main Course

Cuisine: American

Keywords: keto reuben casserole, low carb reuben casserole, reuben casserole, reuben casserole recipe

Calories: 421 kcal

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30 Comments

brenda
0 September 21, 2022Reply

Like very much.
susan
0 August 1, 2022Reply

I discovered that this recipe works WITHOUT the CAULIFLOWER. Now, I love cauliflower but this is not the season for it and that step more than doubles the time to make this dish.
Instead of cauliflower, I made a bottom layer of chopped raw cabbage. Then meat, then dressing, then swiss cheese. It’s so much easier and tastes great. Thanks for the inspiration!
Marci
0 July 22, 2022Reply

Cauliflower??? Why???
- Wholesome Yum D
  0 July 22, 2022Reply
  
  Hi Marci, Cauliflower is low carb so it’s a great alternative to pasta, and it adds veggies to the recipe without adding a strong flavor. You can replace with another veggie or omit if you don’t want to use cauliflower.
Ginger
0 May 13, 2022Reply

This recipe is a winner!! Even my 7 year old granddaughter loved it.
Alice
0 March 20, 2022Reply

Yes I love the recipes
Alice
0 March 20, 2022Reply

Yum. Yum. I am ready to try this TY
Kyle
0 March 17, 2022Reply

I’m more concerned with how much sodium is in this recipe?
- Wholesome Yum D
  0 March 18, 2022Reply
  
  Hi Kyle, Nutrition facts are provided as a courtesy, and if you have questions, please see our nutrition policy.
Linda
0 March 16, 2022Reply

Would this recipe work with out the cauliflower ?
- Wholesome Yum D
  0 March 17, 2022Reply
  
  Hi Linda, Yes, you could omit the cauliflower.
Margaret
0 March 15, 2022Reply

Excited to make make the Reuben Casserole.
Jen
0 September 27, 2021Reply

This is so delicious!!!! Even better when reheated! Used the Boars Head corned beef which was incredible. The dressing is amazing. The combo of cauliflower with sauerkraut is perfect. Highly recommend it – you won’t regret it!
- Andrea
  0 April 3, 2022Reply
  
  My husband prefers pastrami so we’re making it tonight with Boar’s Head Pastrami. I’m so excited!
Glad
0 March 28, 2021Reply

Hi, do you think this would work with roast beef instead of corned beef? I can’t get corned beef here in Sicily and only recently found the former. Thanks!
- Wholesome Yum M
  0 March 29, 2021Reply
  
  Hi Glad, Yes, the recipe will still work fine using roast beef. Enjoy!
  - Jane A Nielsen
    0 May 4, 2021Reply
    
    Delicious as always. Your recipes are no fail. I used left over corned beef from St. Patrick’s day. Made ahead earlier in the day and heated up at dinner time. I love that I can get 4 meals out of the recipe for hubby and I.
    Jane
Debra
0 March 14, 2021Reply

How do I PRINT this ????
- Wholesome Yum M
  0 March 14, 2021Reply
  
  Hi Debra, Please use the ‘Print it’ button located in the recipe card. I hope this helps.
Rosanna Lehman
0 March 13, 2021Reply

Do I need to precook the corned beef?
- Wholesome Yum M
  0 March 14, 2021Reply
  
  Hi Roseanna, Yes, I link the method I use to cook the corned beef at the top of the page. You can also find it here: Pressure Cooker Corned Beef.
Debbie
0 March 8, 2021Reply

This was delicious….something different. I made the thousand island dressing on this website and it was delicious. I bought shaved corned beef at the deli, and several slices of ementhal cheese. was great the next day too.
- Angie
  0 September 19, 2021Reply
  
  I made this and let me tell ya all it was so good that this is my new favorite meal now. So happy I found this recipe!
masheba
0 March 4, 2021Reply

What is a good alternative to cauliflower?
- Wholesome Yum M
  0 March 4, 2021Reply
  
  Hi Masheba, Broccoli would also work great!
Beth
0 March 1, 2021Reply

This looks so delicious and tasty! I can’t wait to make this! My hubby is going to love this!
Tara
0 March 1, 2021Reply

This casserole looks absolutely amazing! Especially with all that melty cheese on top. I love that it can be made ahead too.
Jess
0 March 1, 2021Reply

This is layers of goodness that my whole family loves!
rika
0 March 1, 2021Reply

I love this casserole. It’s so easy to put together, and the seasoning makes it perfect.
Rachel
0 March 1, 2021Reply

This recipe is incredible! Love how simple the ingredients are and how quickly it comes together!