Corned Beef Brisket Reuben Recipe: Smoky-Sweet Sandwich with Crispy Sourdough

This corned beef brisket Reuben recipe delivers the ultimate smoky-sweet sandwich experience with crispy sourdough and perfectly tender meat. 💛 I’ve perfected this dish after years of testing—balancing the tang of sauerkraut, the melt of Swiss cheese, and the rich, savory brisket in every bite.

The secret lies in slow-cooking the brisket until it’s fork-tender, then assembling it with toasted bread that stays sturdy even when piled high.

The process starts with a foolproof slow-cooked brisket that develops deep, caramelized flavors, then moves to layering sauerkraut, Swiss cheese, and corned beef between thick slices of toasted rye or sourdough. What makes this recipe stand out is the texture contrast—crispy bread, creamy cheese, and tender meat all working together.

I’ve tested this with both boiled and slow-cooker methods, and both deliver restaurant-quality results.

By the time you take that first bite, you’ll experience a sandwich with crispy edges, melted cheese oozing with every cut, and layers of flavor that build with each bite. The smoky-sweet brisket pairs perfectly with the tangy sauerkraut and rich Swiss, creating a harmony that’s impossible to resist.

This is comfort food at its finest—ideal for weekend lunches or game day gatherings.

Serve with classic sides like potato salad, pickles, or a side of mustard for dipping. The sandwiches reheat beautifully, making them perfect for meal prep. Let’s create this iconic Reuben that brings New England comfort to your table.

Ingredients for corned beef brisket reuben

Pantry staples plus a few specialty items. The secret’s in the slow-cooked brisket and crispy bread.

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The brisket is non-negotiable here. Costco or Whole Foods usually have the best pre-cooked slices—look for thick-cut, not the thin, dried-out kind. If you’re starting fresh, grab a 3-pound brisket and slow-cook it until fork-tender. The Swiss cheese should be semi-soft, not extra-sharp—it melts better. For the bread, sourdough from the bakery section stays crispy longer than pre-sliced loaves. I always grab extra slices because they disappear fast once toasted.

No Russian dressing? Substitute Thousand Island or mix mayo with a splash of ketchup and pickle relish. Out of Swiss? Gruyère or Emmental work in a pinch, but Swiss is the classic. The sauerkraut can be jarred (just drain it well) or fresh if you’re feeling fancy. Trader Joe’s has great pre-drained sauerkraut that saves time. For the butter, full-fat is a must—Plugrá or Land O’Lakes are my go-tos. No garlic? Skip it, but the minced garlic in the butter makes the toasted bread taste next-level.

Toast the bread just before assembling—it crisps up perfectly in 2 minutes per side in a hot pan with butter. These sandwiches reheat beautifully—wrap them in foil and warm in a 350°F oven for 5-10 minutes. The leftovers keep for 3 days in the fridge, but honestly, they’re best fresh. I always make double batches because they disappear fast at game day gatherings.

Step-by-step instructions for corned beef brisket Reuben

Here’s how to assemble a perfect Reuben with crispy sourdough and all the classic flavors.

Preheat your oven to 375°F and line a baking sheet with parchment paper. Brush each of the 8 slices sourdough bread generously with 1 tablespoon olive oil—this ensures maximum crispiness. I like to use a pastry brush for even coverage.

Place the oiled bread on the prepared baking sheet and bake for 8-10 minutes until the edges are deep golden brown and the bread feels firm to the touch. Watch closely after 6 minutes—your oven might run hot, so start checking at the 8-minute mark. The toast should be crisp enough to stand up to the sandwich filling without getting soggy.

In a small bowl, combine ½ cup Russian Dressing with 2 tablespoons yellow mustard. This tangy-sweet mix is the soul of a great Reuben. Stir well to blend the flavors completely—you want every bite to have that perfect balance of richness and tang.

Next, drain and rinse the 2 cups sauerkraut thoroughly in a colander. Press out as much excess liquid as possible with a clean kitchen towel—wet sauerkraut will make your sandwich soggy. In another bowl, layer the sauerkraut with 8 oz thinly sliced Swiss Cheese, then pour the dressing mixture over everything. Toss gently to coat the cheese and sauerkraut evenly.

If using fresh 3 lb corned beef brisket, slice it thinly against the grain into ¼-inch thick pieces. For pre-cooked brisket, warm it gently in a skillet over medium heat for 2-3 minutes per side until heated through and slightly crispy on the edges. The key here is to maintain that beautiful pink color while adding just enough texture.

While the brisket warms, melt 4 tablespoons unsalted butter in a separate skillet over medium heat. Add the 4 minced garlic cloves and sauté for 30 seconds until fragrant but not browned. Remove from heat and stir in 1 teaspoon salt and ½ teaspoon black pepper. This garlic butter will add an extra layer of flavor to your sandwiches.

Spread a thin layer of the garlic butter on the crispy sourdough toast—this helps create a golden crust when we toast them. Layer each toast with ¼ of the corned beef brisket, then divide the sauerkraut and cheese mixture evenly between the slices. Top with the remaining toast slices to form complete sandwiches.

Return the assembled sandwiches to the oven for 3-5 minutes until the cheese begins to melt and the bread turns a beautiful golden brown. Here’s the thing—don’t over-toast or the bread will lose its crispiness. You’re looking for just enough to melt the cheese and warm everything through.

Remove the Reubens from the oven and let them rest for 1 minute—this prevents cheese from sliding out when you cut them. Arrange each sandwich on serving plates and garnish with ¼ cup thin pickle slices for that classic tangy crunch. The pickles cut through the richness and add a nice contrast in texture.

Serve immediately while the bread is still crisp and the cheese is gooey. Cut each Reuben in half diagonally for that classic presentation. The combination of smoky brisket, tangy sauerkraut, melty Swiss, and crispy sourdough creates a perfect balance of textures and flavors in every bite.

Storing and reheating your corned beef brisket reuben

Fridge Storage Tips

Store your Reubens in an airtight container—I use glass Pyrex with snap-on lids—to keep them fresh for up to 3 days. Let them cool completely first to prevent condensation, which makes the bread soggy.

I always label them with the date so I don’t forget how long they’ve been sitting. 🥫

Reheating Like a Pro

For the best texture, wrap each Reuben tightly in aluminum foil and reheat at 350°F for 5-10 minutes. This keeps the bread crispy while warming the filling evenly. If you’re short on time, a toaster oven works too—just watch closely to avoid burning the edges.

Freezing for Later

While not traditional, you can freeze assembled Reubens for up to 1 month by wrapping them individually in plastic wrap, then foil. Thaw overnight in the fridge before reheating. I’ve tested this method, and the texture holds up surprisingly well—though nothing beats fresh ones. ❄️

Reviving Crispy Bread

If your Reubens lose their crispiness after reheating, pop them under the broiler for 1-2 minutes until the edges brown again. This trick works wonders for sandwiches that’ve softened up. I’ve done this a dozen times at game day gatherings—it’s a lifesaver.

Make-Ahead Sauerkraut Mix

Prep the sauerkraut and cheese filling ahead of time and store it in the fridge for up to 2 days. Just toss it with the Russian dressing right before assembling.

This saves time on game day and keeps the flavors fresh. I’ve found this trick makes hosting way less stressful.

Frequently asked questions