Prep the pan: Heat your oven to 350°F (175°C). Line a 9x13-inch baking dish or sheet pan with parchment for easy cleanup.
Split the rolls: Without separating each roll, slice the entire sheet of slider rolls horizontally. Place the bottom layer in the pan, cut side up.
Set the top layer aside.
Spread the dressing: Brush or spread a generous layer of Russian or Thousand Island dressing over the cut side of the bottom rolls. Aim for even coverage, but don’t oversaturate.
Add the cheese base: Lay a layer of Swiss cheese over the dressing, slightly overlapping slices so the whole surface is covered.
Layer the corned beef: Pile on the corned beef evenly. Fold slices to add height and texture, but keep the layer uniform so the sliders bake evenly.
Drain and add sauerkraut: Squeeze extra liquid from the sauerkraut with paper towels.
Scatter it evenly over the corned beef. This avoids soggy buns and keeps flavors balanced.
Top with more cheese: Add a final layer of Swiss. This helps “glue” everything together as it melts.
Cap the rolls: Place the top layer of rolls over the fillings, aligning the edges.
Make the butter topping: Melt the butter and stir in caraway seeds, garlic powder, onion powder, Dijon, and a few grinds of black pepper.
Brush this mixture over the tops of the rolls. This step adds classic Reuben aroma and extra flavor.
Bake covered: Tent the pan loosely with foil and bake for 12–15 minutes, until the cheese is mostly melted.
Finish uncovered: Remove the foil and bake another 5–7 minutes to toast the tops. You’re looking for golden-brown and slightly crisp.
Rest and slice: Let the sliders rest for 5 minutes. Cut along the roll seams to separate.
Serve with extra dressing on the side if you like.