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Easy Keto Reuben Casserole

A warm, cheesy, low-carb version of the classic Reuben sandwich with corned beef, sauerkraut, Swiss, and creamy Thousand Island flavors. No bread, all comfort.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 6

Ingredients
  

  • 3 cups cooked corned beef sliced or shredded
  • 2 cups sauerkraut drained and squeezed dry
  • cups shredded Swiss cheese divided
  • 1/2 cup cream cheese softened
  • 1/2 cup mayonnaise
  • 1/4 cup sugar-free ketchup
  • 2 teaspoons dill pickle relish no sugar added
  • 1 teaspoon Dijon mustard
  • 1/2 teaspoon onion powder
  • 1/4 teaspoon black pepper
  • 1 tablespoon butter optional, for sautéing sauerkraut
  • Optional add-ins: 1/2 cup sautéed onions 1/4 teaspoon smoked paprika, extra crisped corned beef for topping

Instructions
 

  • Drain sauerkraut and squeeze out moisture well to prevent a watery casserole.
  • Mix cream cheese, mayonnaise, sugar-free ketchup, relish, Dijon, onion powder, and black pepper until smooth.
  • Optional: sauté sauerkraut in butter 3–5 minutes to mellow acidity and deepen flavor.
  • Grease a 9×13 baking dish, spread corned beef on the bottom, toss sauerkraut with half the dressing, layer it over the beef, and sprinkle 1 cup Swiss on top.
  • Bake at 375°F (190°C) for 20–25 minutes until cheese melts and edges are golden.
  • Drizzle remaining dressing on top, add the rest of the Swiss, and return to the oven 5 minutes to melt; rest 8–10 minutes before serving.

Notes

Squeeze sauerkraut very dry for the best texture and flavor.
Let the casserole rest so the layers set and slice cleanly.
Use pastrami for a spicier, deli-style twist.