Reuben Casserole – Comforting, Easy Weeknight Classic

Imagine all the beloved flavors of a Reuben sandwich, tender seasoned beef, tangy sauerkraut, melty Swiss cheese, and creamy dressing, baked into one soul-soothing casserole. This Reuben Casserole is comfort food at its finest, designed to make busy weeknights feel warm and satisfying. With easy prep, pantry-friendly ingredients, and crowd-pleasing appeal, it’s a recipe your whole family will come back to again and again.

Why You’ll Love This Recipe

• All-in-one comfort: combines protein, veggies, and cheese in every satisfying bite.
• Easy prep & bake: minimal hands-on time with big flavor payoff.
• Family friendly: loved by kids and adults alike.
• Make-ahead potential: great for meal prep or leftovers the next day.
• Perfect for cozy nights: warm, cheesy, and comforting any time of year.

Ingredients

• 1 lb corned beef, chopped or shredded
• 3 cups sauerkraut, well drained
• 3 cups rye bread, cubed (day-old preferred)
• 2 cups Swiss cheese, shredded
• 1 ½ cups whole milk
• 3 large eggs
• ½ cup mayonnaise
• 2 teaspoons Dijon mustard
• 1 teaspoon garlic powder
• ½ teaspoon black pepper
• Optional garnish: sliced green onions

Step-by-Step Instructions

1. Preheat oven and prepare dish: Preheat your oven to 350°F (175°C). Grease a 9×13-inch (23×33 cm) baking dish with a light coating of oil or non-stick spray.
2. Layer bread, meat, and kraut: Spread the cubed rye bread evenly in the bottom of the dish. Sprinkle the chopped corned beef over the bread, followed by the drained sauerkraut.
3. Add cheese: Evenly distribute 1 ½ cups (150 g) of the shredded Swiss cheese over the beef and kraut layer.
4. Make the custard: In a large bowl, whisk together the eggs, milk, mayonnaise, Dijon mustard, garlic powder, and black pepper until smooth and well combined.
5. Combine and soak: Pour the egg mixture evenly over the casserole layers, gently pushing down with a spatula so the bread absorbs the liquid mixture.
6. Top and bake: Sprinkle the remaining ½ cup (50 g) of Swiss cheese on top. Bake in the preheated oven for 35–40 minutes, until the casserole is set and the top is lightly golden and bubbly.
7. Rest and serve: Let the casserole rest for 5 minutes before slicing. Garnish with sliced green onions if desired.

Tips & Variations

• Cheese alternatives: If you prefer a different flavor or milder cheese, swap Swiss for provolone or mozzarella, or add a combo of cheddar for extra richness.
• Sauerkraut tip: Be sure to drain the sauerkraut well to keep the casserole from becoming too soggy. A quick squeeze in a clean kitchen towel works great.
• Healthier twist: For a lighter version, use low-fat milk and reduce the cheese slightly. Adding a handful of chopped spinach or shredded cabbage can boost the veggie count.
• Bread swaps: No rye? Whole-wheat, sourdough, or even cubed focaccia can work beautifully.
• Dressing variation: Try a homemade Thousand Island-style sauce (ketchup + mayo + sweet pickle relish) mixed into the custard for a classic Reuben vibe.

Storage & Freezer Instructions

• Refrigerator: Store cooled leftovers in an airtight container for up to 3–4 days. Reheat in the oven at 350°F (175°C) or in a microwave until warmed through.
• Freezer: This casserole freezes well! Wrap the baked and fully cooled casserole tightly with plastic wrap and foil, or use freezer-safe containers. Freeze for up to 2 months. Thaw overnight in the fridge before reheating.

Serving & Pairing Ideas

• Crisp green salad with lemon vinaigrette
• Pickle spears or crunchy pickled veggies
• Creamy coleslaw or apple slaw
• Tomato soup or vegetable broth soup
• Soft dinner rolls or a tangy mustard sauce on the side

Frequently Asked Questions

What makes this different from a Reuben sandwich?

A classic Reuben sandwich is layered between slices of rye and grilled, but in this casserole version, all the beloved components, corned beef, sauerkraut, Swiss cheese, and that creamy dressing-style sauce, are baked together with cubes of bread. This creates a warm, homestyle dish that’s easier to make for a crowd or weeknight dinner.

Can I make this gluten-free?

Yes, simply use gluten-free bread cubes instead of regular rye. Make sure all other ingredients (like mustard and mayonnaise) are labeled gluten-free if you’re cooking for someone with celiac disease or a sensitivity. Gluten-free bread may absorb liquids differently, so let it sit a little longer before baking to help it soak up the custard.

Is there a vegetarian version of Reuben Casserole?

Absolutely! Swap the corned beef for plant-based “corned beef” alternatives or use hearty cooked mushrooms seasoned with smoked paprika and liquid smoke for that savory umami profile. You can also boost vegetables like thinly sliced cabbage or roasted beets for texture and flavor.

How do I adjust the flavor if I don’t like sauerkraut?

Sauerkraut gives that signature tang, but if it’s not your favorite, you can reduce the amount or mix in some finely chopped pickles for milder acidity. Another option is to rinse the sauerkraut under cold water and squeeze dry, this cuts some of the sharpness while maintaining the texture.

Ready to Make It?

There’s something deeply satisfying about a casserole that brings comfort without fuss, and this Reuben Casserole delivers all the cozy flavors you crave with minimal effort. Whether you’re feeding family, prepping ahead, or just craving melty, savory goodness, this recipe is a delicious choice. Enjoy every warm, cheesy bite.

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