The flavors from a Reuben sandwich in the form of a one-pot dinner is what this Slow Cooker Reuben Casserole is about, prepared using red potatoes, sauerkraut, corned beef, Swiss cheese, and sour cream.

To make Reuben Casserole in your slow cooker or crockpot, start by layering all the ingredients, set it on low for 4-6 hours, and let the magic happen as everything melds into a delicious, cheesy delight.

Who knew your slow cooker could be a deli in disguise? Dive into this recipe, laugh at how ridiculously easy it is, and drop a comment below if it rocked your taste buds!

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Slow Cooker Reuben Casserole Ingredients

• 1 cup (240 mL) of chicken broth
• 1 and 1/2 pounds (680 grams) of red potatoes, cubed
• 1 tbsp (15 mL) of dehydrated onion flakes
• 1 tsp (5 mL) of garlic powder
• A dash of salt and pepper
• 1 (16 oz or 454 grams) can or jar of sauerkraut, thoroughly rinsed and drained
• 16 ounces (454 grams) of chopped cooked corned beef
• 1 cup (240 mL) of sour cream
• 1 tbsp (15 mL) of cornstarch
• 1 cup (240 mL) of shredded Swiss cheese

Optional (but highly recommended) Rye Bread Croutons:

• 2 slices of rye bread
• 1 tbsp (15 mL) of olive oil for that golden touch

How To Make Reuben Casserole In Slow Cooker

1. Load Up Your Slow Cooker: Pour the chicken broth into your slow cooker like you’re starting a broth pool party, and toss in the red potatoes.
2. Add the Spices: Sprinkle in the dehydrated onion flakes and garlic powder, then season with salt and pepper like a true spice wizard.
3. Mix in the Goods: Gently add the sauerkraut and corned beef, giving everything a good stir to ensure every bite is loaded with flavor.
4. Set It and Forget It: Cover your slow cooker and set it to high for 3 hours or low for 4-6 hours; patience will reward you with tender potatoes.
5. Crouton Craze: If you’re in the mood for some crunch, heat the olive oil in a pan, cube your rye bread, and fry those pieces till they’re crispy heroes. Set them aside—they’ve earned it!
6. Temper Your Sour Cream: Scoop half a cup of the hot liquid from the slow cooker and whisk it into your sour cream, marrying them like a culinary Romeo and Juliet.
7. Thicken the Plot: Dissolve the cornstarch in the sour cream mixture, ensuring it’s smooth and ready to mingle back into the slow cooker.
8. Cheese It Up: Stir the Swiss cheese into the mix and watch it melt into stretchy, gooey perfection.
9. Serve and Savor: Spoon that hearty casserole onto plates, crown it with your rye croutons, and if you feel snazzy, drizzle some thousand island dressing over the top to nail that Reuben vibe.

Can I Make This Reuben Casserole Vegetarian?

Absolutely! Swap out the corned beef for a hearty plant-based substitute like tempeh or seitan. You’ll still get that rich, comforting feel without the meat. Make sure your substitutes absorb the flavors well by marinating them beforehand.

Recipe Tips

• Mix Up the Meat: If you’re not a huge fan of corned beef or just want to try something new, swap it out for smoked turkey or pastrami to keep things interesting and tasty.
• Cheese Please: Not a fan of Swiss cheese? Mix it up by using sharp cheddar or provolone for a cheesy twist that brings a different punch to your casserole game.
• Spice It Right: For an extra kick, sprinkle some crushed red pepper flakes into your casserole mix before cooking; it’ll give you a little zing without overpowering the classic Reuben flavors.
• Crispy Top Layer: Want to add a bit of crunch to your casserole’s texture? Top it off with crushed rye crackers in the last 10 minutes of cooking for that perfect crispy finish.

Recipe Variations

• Vegan Vibes: Make it vegan by using plant-based sour cream, and vegan Swiss cheese, and swapping the corned beef for seasoned tempeh or tofu that’s been sautéed until crispy.
• Low Carb Solution: Cut down on carbs by substituting the potatoes with cauliflower florets; it’s a sneaky way to keep things light and works surprisingly well with the sauerkraut and meat.
• Gluten-Free Fix: To keep this dish gluten-free, ensure your corned beef and all other ingredients are gluten-free and use gluten-free rye bread for those optional croutons.
• Extra Veggies: Sneak in some extra nutrients by adding chopped bell peppers or spinach into the slow cooker; they’ll cook down nicely and add a pop of color and freshness to your hearty casserole.

What To Serve With Reuben Casserole

Serve your Reuben Casserole with Sweet Potato Wedges for a sweet contrast, apple slaw for a crunchy tang, and Gingered Pears for a zesty bite. Garlic-buttered green beans and creamy coleslaw also make great sides.

You can also pair it with a German potato salad or a refreshing cucumber salad for a light touch.

How To Store Leftover Reuben Casserole

In The Fridge:

Wrap your Reuben Casserole tightly with cling film or store it in an airtight container to keep it fresh. It will stay delicious and safe to eat for up to 3 to 4 days when refrigerated properly.

In The Freezer:

Reuben Casserole is best enjoyed fresh and is not recommended for freezing due to the creamy sauce and potatoes, which can become grainy and watery when thawed.

How To Reheat Leftover Reuben Casserole

Reheat your leftover Reuben Casserole in a preheated oven at 350 degrees Fahrenheit for about 20-25 minutes until it is thoroughly heated through.

Alternatively, gently warm it in a microwave, using a microwave-safe dish, for about 3-5 minutes, stirring halfway through to ensure even heating.

Check out More Slow Cooker Recipes:

• Slow Cooker Beef and Red Wine Casserole
• Slow Cooker Taco Casserole Recipe
• Slow Cooker Hamburger Hash