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I’ve been making a Reuben casserole on rainy Sundays for years — it’s the easiest way to capture all the tangy, cheesy goodness of a Reuben sandwich without standing at the stove. This casserole layers rye bread, corned beef, sauerkraut, pickles, Thousand Island, and Swiss into a single pan for a hands-off bake that’s perfect for busy weeknights, potlucks, or St. Patrick’s Day dinners. If you like hearty one-dish meals, you might also enjoy this collection of best crockpot and casserole recipes for more family-friendly ideas.

Why you’ll love this dish

This Reuben casserole takes everything you love about a hot Reuben sandwich and multiplies it into a tray-bake everyone can dig into. It’s satisfying, made mostly from pantry and deli staples, and scales easily for a crowd. Because the rye cubes crisp on top while the layers underneath stay saucy, you get a pleasing contrast of textures in every bite.

“I made this for a family dinner and everyone asked for seconds — the flavors are exactly like the original sandwich, but faster and less messy.” — a regular at my kitchen table

Reasons people search for this recipe: quick weeknight comfort, a new way to use leftover corned beef, and an easy party dish that travels well.

How this recipe comes together

Cube rye bread and toss with melted butter and garlic powder to get golden, flavorful cubes.
Layer half the bread in a greased baking dish as the base.
Add sliced or chopped corned beef, well-drained sauerkraut, chopped dill pickles, parsley, salt, and pepper.
Drizzle Thousand Island dressing and top with Swiss cheese.
Finish with the remaining buttered bread cubes and bake until the top is golden and the cheese is melted.
This short process creates a layered casserole that’s both cheesy and tangy with crisp rye on top.

Gather these items

6 cups rye bread, sliced into 1-inch cubes (day-old rye works best)
1/4 cup melted butter
1/2 teaspoon garlic powder
1 pound cooked corned beef, sliced or chopped
1 (16-ounce) jar sauerkraut, drained and rinsed
1/2 cup chopped dill pickles
1/4 cup chopped fresh parsley
Salt and pepper, to taste
1 cup Thousand Island dressing
6 slices Swiss cheese

Substitution notes:

Swap Thousand Island for Russian dressing or a creamy horseradish sauce for more bite.
For gluten-free, use gluten-free rye-style bread.
If you prefer milder cheese, provolone works fine instead of Swiss.
If you want other easy casserole inspiration while you prep, try this 5-ingredient cheesy meatball casserole for a super-simple alternate bake.

Step-by-step instructions

Delicious Reuben Casserole with layers of corned beef, sauerkraut, and cheese

Preheat the oven to 350°F. Lightly grease a 9×13-inch baking dish with cooking spray.
Put the rye bread cubes into a large bowl. In a small bowl, stir together the melted butter and garlic powder.
Pour the butter mixture over the bread cubes and toss until the cubes are lightly coated.
Spread half of the buttered bread cubes evenly in the bottom of the prepared dish. Press lightly to form a base.
Layer the corned beef over the bread. Scatter the rinsed sauerkraut on top of the beef.
Sprinkle the chopped dill pickles and parsley over the sauerkraut. Season lightly with salt and pepper.
Drizzle the Thousand Island dressing evenly across the layered ingredients. Arrange the Swiss cheese slices over the dressing.
Top the cheese with the remaining buttered bread cubes, covering the casserole.
Bake for 20–25 minutes, until the top bread cubes are light golden and the cheese has melted.
Let the casserole rest for 5 minutes. Cut into squares and serve warm.

Short, active steps keep the assembly tidy and help even home cooks follow without missing a detail.

What to serve it with

Crisp green salad or coleslaw to cut the richness.
Potato chips, kettle-cooked for crunch, or a warm potato salad for comfort.
Pickles or extra dill slices on the side to boost the tang.
Beer (a pilsner or amber) or a simple iced tea works well for pairing.
For a brunch twist, serve alongside scrambled eggs and roasted tomatoes.

Plating tip: serve slices with a little extra Thousand Island on the plate and a sprig of parsley for color.

Storage and reheating tips

Refrigerate leftovers in an airtight container for up to 3–4 days. Cool to room temperature before sealing.
To reheat, warm single portions in the microwave for 60–90 seconds, or reheat in a 350°F oven for 10–15 minutes until heated through. For a crisp top, broil 1–2 minutes at the end (watch closely).
To freeze: wrap tightly or place portions in freezer-safe containers for up to 2 months. Thaw overnight in the refrigerator before reheating.
Food safety: always reheat until the casserole reaches 165°F in the center. Discard any leftovers left at room temperature for more than two hours.

Pro chef tips

Drain the sauerkraut thoroughly and even press between paper towels. Excess moisture is the main reason casseroles get soggy.
Use day-old rye for firmer cubes that hold up during baking. Fresh bread can collapse.
If you like a crispier top, stir an extra tablespoon of melted butter into the remaining bread cubes before topping. Or broil for 60–90 seconds at the end.
Chop pickles coarsely if you want noticeable bites, or finely if you want the flavor distributed.
Make ahead: assemble the casserole up to the point of baking, cover tightly, and refrigerate for up to 24 hours. Add five more minutes to baking time if cold from the fridge.
For another speedy casserole trick (25-minute and pantry-friendly), check out this 25-minute crack chicken casserole.

Creative twists

Vegetarian: replace corned beef with seasoned, smoked tempeh or thinly sliced marinated mushrooms. Use vegan cheese and a dairy-free dressing.
Turkey Reuben: swap corned beef for leftover turkey for a lighter version.
Crunch-topping: mix panko with a tablespoon of melted butter and sprinkle over the top for extra crunch.
Mini Reuben bites: assemble into a muffin tin for party-sized servings.
Spicy: stir a little sriracha into the Thousand Island for heat.
These variations keep the core flavor profile but let you adapt to diets, ingredients on hand, or party needs.

Common questions

Q: Can I make this casserole ahead of time?
A: Yes — assemble but don’t bake. Cover tightly and refrigerate up to 24 hours. Bake straight from the fridge and add 5–10 minutes to the baking time.

Q: Can I freeze the baked casserole?
A: Yes. Cool completely, then wrap tightly or transfer to a freezer-safe container for up to 2 months. Thaw in the fridge overnight before reheating.

Q: My casserole was soggy — what went wrong?
A: Most likely excess moisture from the sauerkraut or fresh bread. Drain and pat the sauerkraut dry. Use day-old rye or toast the bread cubes lightly before assembling.

Q: Can I use leftover corned beef from a boiled brisket?
A: Absolutely. Slice or chop the leftover corned beef and use it in the recipe. It’s a great way to repurpose leftovers.

Conclusion

If you want a slightly different take or extra inspiration, this Reuben Casserole recipe from Pinch of Yum has a similar assembly and helpful photos. For another simple baked version with clear step photos, see this Reuben Casserole on Dinner in 321. And if you’d like a tried-and-true family-style recipe to compare textures and tweaks, The Country Cook’s Baked Reuben Casserole is a great reference.