Reuben Bake Casserole
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If you love a Reuben sandwich, you’ll love this Reuben bake casserole which is basically a deconstructed version of the classic deli sandwich converted for a group. It’s got the tangy, savory, melty goodness I love, just baked into an easy layered dish instead of stacked between slices. Think toasty bread cubes, corned beef, sauerkraut, and cheese all bubbling together like they were meant to be.
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There’s never a wrong time to make a Reuben sandwich, but I especially crave them around this time of year. And if I’m not in the mood for stacking and flipping sandwich after sandwich, I take the pieces/parts and make this easy casserole, particularly when I’m feeding a group!
I make corned beef and cabbage every St. Patrick’s Day, because 1) it’s delicious! And 2) because I’m counting on the leftovers the next day. Leftover corned beef is perfect in this easy Reuben casserole, though I’ll happily grab some sliced corned beef from the deli so I can make it year-round. The bread cubes bake up perfectly toasty and chewy in the oven, then I finish everything off with sauerkraut, Swiss cheese, thousand island dressing, and a buttery mustard topping to bring those classic Reuben flavors home.
Helpful Tips & Variations
- Pretzel rolls or Rye bread. Rye bread is traditional for a Reuben, which I love, but I also like using pretzel slider rolls here because after baking with the sauce and kraut, it stays pleasantly chewy with crisp edges instead of getting too soft. That said, feel free to use 8 cups of cubed rye bread instead. Both work!
- Drain your sauerkraut really well. Make sure you ring out all the liquid, or the casserole could get soggy.
- Corned beef options. I’ve made this Reuben casserole bake with home-cooked leftovers, and I’ve made it with deli slices; both are great. You can also use pastrami if that’s what’s in your fridge.
- Low on corned beef? If you’re using leftovers and don’t quite have enough, shred the corned beef instead of chopping it. It spreads out more evenly through the corned beef casserole so every scoop still feels loaded.
Reuben Bake Casserole
Ingredients
- 8 cups small cubed pretzel slider buns, divided (see note)
- 1 lb. cooked corned beef, chopped
- 1 cup fully drained sauerkraut
- ½ cup Thousand Island dressing
- 2½ cups shredded Swiss cheese
- 5 tbsp unsalted butter, melted
- 1 tbsp spicy brown mustard
- 2 tsp minced dried onion flakes
Instructions
- Preheat oven to 400℉. Lightly coat a 9×13 baking pan with nonstick cooking spray.
- Place half of the bread cubes in the pan, followed by the corned beef, and then the sauerkraut.
- Drizzle with Thousand Island dressing.
- Sprinkle the shredded cheese.
- Top with the remaining bread cubes.
- In a small bowl, whisk together the melted butter, mustard, and dried onion flakes. Pour over the bread cubes.
- Bake uncovered for 20-25 minutes or until bread is toasted and cheese has melted.
- Serve hot and enjoy!
Video
Notes
Nutrition
Nutritional information given is an automatic calculation and can vary based on the exact products you use and any changes you make to the recipe. If these numbers are very important to you, I would recommend calculating them yourself.
Did you make this? Leave a rating below!How to Make Reuben Bake Casserole Step by Step
Before you start: Gather all of your ingredients and preheat the oven to 400°F. Lightly spray a 9×13-inch baking pan with nonstick spray.
Layer the casserole: Add 4 cups small-cubed pretzel slider buns to the pan in an even layer. Evenly scatter 1 lb. chopped corned beef over the bread, then spoon on 1 cup fully drained sauerkraut in an even layer.
Drizzle over ½ cup Thousand Island dressing, then add 2½ cups shredded Swiss cheese, and finish with the remaining 4 cups cubed pretzel buns.
Add the butter topping: Stir together 5 Tbsp melted unsalted butter, 1 Tbsp spicy brown mustard, and 2 tsp minced dried onion flakes in a small bowl until combined. Pour the butter mixture evenly over the bread cubes in the casserole dish.
Bake: Place the Reuben bake casserole into the preheated oven and bake uncovered for 20-25 minutes, until the top is nicely toasted and the cheese is fully melted. Serve warm, and enjoy!
Serving Suggestions
I can easily see this Reuben bake casserole served for brunch, lunch, or dinner with no complaints. It’s delicious with something crunchy on the side, so pickle spears are always a yes, and fried pickles are a fun and tasty alternative. Air fryer onion rings are another great match because the crisp, salty bite plays so well with the cheesy casserole. If I want something fresher on the plate, my cauliflower salad or some roasted broccoli are perfect.
How to Store
- Fridge. This Reuben bake casserole is best served fresh for the best texture. If you do have leftovers, let them cool, then cover the pan tightly or transfer to an airtight container. Store in the fridge for up to 3 days.
- Freezer. To freeze, transfer to a freezer-safe container for up to 2 months. Thaw overnight in the fridge before reheating.
- Reheat. To reheat, warm individual servings in the microwave in 30 second bursts until hot, or reheat in a 350°F oven covered with foil for about 15 minutes. Uncover for the last few minutes if you want the top to crisp back up.
More Reuben-Style Recipes
- Reuben Pretzel Sliders: All the classic Reuben flavors packed into baked pretzel rolls—these are a game day favorite!
- Reuben Quesadillas: Turn leftover corned beef into a quick, cheesy meal with sauerkraut, Swiss, and Thousand Island dressing.
- Hot Reuben Dip: Transform a Reuben sandwich into a warm, creamy dip that’s easy to make.
- Reuben Pinwheels: A quick appetizer that’s perfect for St. Patrick’s Day.
I hope you love this delicious and easy recipe – be sure to give it a review below! Also don’t forget to follow Belly Full on TikTok, Facebook, Instagram, Pinterest, and YouTube!
This was so good! It’s definitely going to be a regular at our house! This is my husband’s favorite sandwich sandwich so to have it all together like this was an instant win! Plus it not only tastes great but is quick and easy to make!
Delicious. Thank you for another great recipe. Definitely one of our favorites.
Yes I made it and it turned out great, and so easy.