Slow Cooker Reuben Casserole

By: Shannon Epstein

Slow cooker Reuben casserole has all the flavors of the classic deli sandwich…but in casserole form. This casserole is especially perfect for using up leftover corned beef, making it a perfect meal after St. Patrick’s Day or any corned beef dinner. With just 5 simple ingredients, it’s easy to assemble and lets the crockpot do all the work while the flavors meld together into a warm, cheesy, satisfying meal.

Ingredients For Slow Cooker Reuben Casserole

Only 5 ingredients! 

  • Cooked Corned Beef
  • Rye Bread
  • Sauerkraut
  • Thousand Island or Russian Dressing
  • Swiss Cheese

collage of ingredients for Slow Cooker Reuben Casserole

How To Make Slow Cooker Reuben Casserole

  • Spray the slow cooker generously with cooking spray. 
  • Add the toasted rye bread. Top with the cooked corned beef, spread the  sauerkraut on top, then spread the dressing, and top with the Swiss cheese. 
  • Cook on LOW for 2 to 3 hours. 

FAQs & Tips

What is a Reuben?

A Reuben is a classic American deli sandwich that features corned beef, Swiss cheese, sauerkraut, and Russian or Thousand Island dressing on rye bread.  

What type of corned beef should you use?

This slow cooker Reuben casserole calls for cooked corned beef. This can be leftover corned beef that is shredded or diced, or you can also use canned corned beef. 

How much dressing should you use?

For me, 8 ounces of dressing is enough. You may want more. Add more to the casserole or serve extra dressing on the side. You can use thousand island or Russian dressing with this recipe. 

Can you add more cheese?

Absolutely. I like to add between 6 slices of Swiss cheese. If you want this casserole to be cheesier, feel free to add as much cheese as you want. Of course you can also use less cheese.

How do you store leftovers?

Store leftover crockpot Reuben casserole in the refrigerator for up to 4 days. 

Can you freeze this?

Maybe. Unfortunately, I have not tried freezing this.

What size slow cooker did I use?

I use small 3.5-quart slow cooker. Feeding a larger crowd? Double the recipe and use a larger 6-quart slow cooker!

close up shot of cooked Reuben Casserole on a white plate

Corned Beef Recipes

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Slow Cooker Reuben Casserole

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5 from 2 reviews

Slow cooker Reuben casserole has all the flavors of the classic deli sandwich…but in casserole form. This casserole is especially perfect for using up leftover corned beef, making it a perfect meal after St. Patrick’s Day or any corned beef dinner. With just 5 simple ingredients, it’s easy to assemble and lets the crockpot do all the work while the flavors meld together into a warm, cheesy, satisfying meal.

  • Author: Shannon Epstein
  • Prep Time: 10 minutes
  • Cook Time: 3 hours
  • Total Time: 3 hours, 10 minutes
  • Yield: 6 servings 1x
  • Category: Dinner
  • Method: Slow Cooking
  • Cuisine: American, Irish

Ingredients

Units Scale
  • 1/2 pound cooked corned beef
  • 4 slices rye bread, toasted & torn into pieces
  • 8 ounces sauerkraut, rinsed & drained of excess liquid
  • 8 ounces thousand island or Russian dressing
  • 6 slices Swiss cheese, torn into pieces

Instructions

  • Spray the slow cooker generously with cooking spray.
  • Add the toasted rye bread to the bottom. Top with the cooked corned beef, spread the  sauerkraut on top, then spread the dressing, and top with the Swiss cheese.
  • Cook on LOW for 2 to 3 hours.

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overhead shot of cooked Reuben Casserole in a black slow cooker with a piece missing

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Meet The Author

Hi, I’m a home cook from Los Angeles. I received a slow cooker as a wedding gift in 2011, but it wasn’t until six months later, facing my highest weight and hypertension, that I started using it. Follow me to learn more about my journey to healthier living and discover delicious recipes along the way.

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2 thoughts on “Slow Cooker Reuben Casserole”

  1. I saw this recipe on Facebook. I used canned corned beef since I don’t have any leftover and corned beef is expensive. Good recipe.

  2. I am so happy to find a recipe to use leftover corned beef that isn’t the usual hash or soup. I LOVED this. I didn’t toast the bread so mine was a little soggy. Next time I will toast it. I added leftover grilled onions on top of the corned beef before the sauerkraut. I recommend you try it! I stocked up on corned beef since it’s now on sale. I plan on making this again, soon. My husband already requested it again.

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