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Leftover Corned Beef Breakfast Sandwich Recipe

If you're looking for something new to make with your leftover corned beef try our leftover corned beef breakfast sandwiches. They are tasty and so filling that you'll forget all about lunch.
5 from 1 vote
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Course: Breakfast
Cuisine: American
Prep Time: 10 minutes
Cook Time: 15 minutes
Total Time: 25 minutes
Servings: 4


  • 4 Brioche Buns
  • 8 Oz Corned Beef
  • 4 Hash Browns Store-bought or homemade
  • Small Yellow Onion Diced / About 1 Cup
  • 4 Large Eggs
  • 4 Slices American Cheese

Russian Dressing

  • 1/2 Cup Mayo
  • 2 Tbsp Ketchup
  • 1 Tsp Worcestershire Sauce
  • 2 Tsp Horseradish
  • 2 Tbsp Lemon Juice
  • 1/4 Tsp Salt
  • 1/4 Tsp Black Pepper
  • 2 Tbsp Pickle Relish


  • In a small bowl add all the ingredients for the dressing and mix until combined. Refrigerate until ready to assemble the sandwich.
  • Get the instructions on how to make homemade hash browns here. You can absolutely use store-bought.
  • Preheat a non-stick pan to medium-high and add 1 tablespoon oil and 1 tablespoon unsalted butter. Add the diced onions and cook until starting to brown. About 5-8 minutes. Place in a bowl and set aside.
  • In a non-stick pan, melt 1 teaspoon butter on medium-low until bubbles start to form. Add the egg and cook until the egg whites start to set and the yolk is still runny. About 3-4 minutes. Sprinkle with salt, pepper, and fresh thyme (optional).
  • Slice the corned beef into strips and add it to a medium pan with 1 tablespoon of water. Put on the lid and heat through about 3 minutes.
  • Time to assemble, add the Russian dressing to the top and bottom bun. Then, add the sauteed onions, corned beef, hash brown, a slice of cheese, and egg. Continue until all sandwiches are made. Time to enjoy!


  • The dressing is delicious but will get even better if you can make it in advance. Preferably overnight.
  • If using store-bought frozen hash browns then heat them in the air fryer at 400 degrees for 8-10 minutes. 
  • You want to cut the corned beef against the grain.
  • We steamed the buns since we used store-bought and they weren't as soft as we'd like. 
  • Store the cooked corned beef in an air-tight container in the fridge for up to 4 days. 
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