Leftover Corned Beef Casserole

Leftover Corned Beef Casserole

Do you ever find yourself with Leftover Corned Beef Casserole after a festive St. Patrick’s Day feast? Rather than letting those delicious slices go to waste! why not transform them into a comforting and flavorful leftover corned beef casserole? This hearty dish combines rich and tender corned beef with creamy potatoes, savory vegetables, and melted cheese for a satisfying meal that will have you eagerly reaching for seconds. Join me as we dive into the world of leftover corned beef casserole and discover a delightful way to repurpose your St. Patrick’s Day leftovers.


  • 2 lbs cooked corned beef, small diced
  • 1 loaf marbled rye bread (16 oz), small cubed
  • 1 lb Swiss cheese, finely shredded
  • 1 cup Russian dressing or Catalina dressing
  • 1 cup mayonnaise
  • 1 cup sauerkraut


1️⃣ In a large bowl, mix all the ingredients together. Make sure to use an extra large bowl!
2️⃣ Pour the mixture into a 9×13 casserole dish and scrape the sides well to get all the casserole ingredients out.
3️⃣ Using a large spoon or spatula, press the casserole into the dish so everything is tightly packed.
4️⃣ Bake uncovered on the center oven rack at 350°F for 30-45 minutes, or until the casserole is heated through and the top is browned to your liking.


If you can’t find corned beef, pastrami can be a great substitute.
If you can’t find Russian dressing, Catalina dressing has a similar flavor.
Using freshly shredded cheese is preferred, but pre-shredded cheese works as well.

The Main Attraction: Corned Beef:

At the heart of this casserole lies the star ingredient – corned beef. Corned beef is a flavorful and tender cut of meat that becomes even more delectable when used as the centerpiece of a casserole. Its rich and savory taste infuses the entire dish, creating a comforting and satisfying meal.

Perfectly Paired: Potatoes and Vegetables:

To complement the corned beef, potatoes, and vegetables play a crucial role in adding both texture and flavor to the casserole. Creamy mashed potatoes serve as a hearty base, providing a velvety and comforting layer that binds the ingredients together. The addition of sautéed onions, carrots, and cabbage adds a delightful medley of flavors and a touch of freshness. Together, these ingredients create a harmonious balance that is sure to please your taste buds.

Meltingly Delicious: Cheese Topping:

No casserole is complete without a generous layer of melted cheese on top. The gooey and golden cheese not only adds a rich and indulgent element but also helps to create a delightful crust that perfectly complements the tender corned beef and vegetables underneath. Choose your favorite melting cheese, such as cheddar or Swiss, and sprinkle it generously over the casserole before baking to achieve that irresistible cheesy goodness.

A Versatile Dish:

While leftover corned beef casserole is an excellent way to repurpose St. Patrick’s Day leftovers, it can also be enjoyed throughout the year. Whether you have leftover corned beef from a special occasion or simply want to explore new flavor combinations, this casserole is a versatile dish that can be enjoyed as a cozy family dinner or shared with friends during a casual gathering.


The leftover corned beef casserole is a delightful solution to the conundrum of excess corned beef. By repurposing leftovers into a comforting and flavorful dish, you not only minimize food waste but also create a meal that is equally delicious and satisfying. So, the next time you find yourself with leftover corned beef, don’t let it go to waste. Instead, transform it into a mouthwatering casserole that will have your taste buds dancing with joy.

Frequently Asked Questions:

Q: Can I use other types of meat in the casserole?

A: Absolutely! While corned beef is the traditional choice for this casserole, you can experiment with other cooked meats such as roast beef or ham. Just make sure to adjust the seasonings accordingly to complement the different flavors.

Q: Can I make this casserole ahead of time?

A: Yes, you can! The leftover corned beef casserole can be prepared in advance, making it a convenient option for busy days or when entertaining guests. Simply assemble the casserole, cover it tightly, and refrigerate until you’re ready to bake it. Just keep in mind that the baking time may need to be slightly extended if you’re starting with a chilled casserole.

Q: Can I freeze the leftover corned beef casserole?

A: Absolutely yes. Allow the casserole to cool completely, then transfer it to an airtight container or freezer-safe dish. Label it with the date and freeze it for up to three months. When ready to eat, thaw it overnight in the refrigerator and then reheat it in the oven until heated through.

Q: What can I serve with leftover corned beef casserole?

A: Leftover corned beef casserole is a complete meal on its own, but you can certainly pair it with some simple side dishes to enhance the dining experience. A fresh green salad, steamed vegetables, or a crusty loaf of bread are all excellent options to accompany the casserole and add additional textures and flavors to the meal.

Q: Can I modify the vegetables in the casserole?

A: Absolutely! The beauty of this casserole is its adaptability. You can customize the vegetables to your liking or based on what you have on hand. Consider adding diced bell peppers, peas, or even roasted Brussels sprouts for an extra pop of color and flavor.

Q: Can I make this casserole gluten-free?

A: Yes, you can! Simply substitute gluten-free flour for thickening the sauce and use gluten-free breadcrumbs or crushed gluten-free crackers for the topping. Be sure to check the labels of any processed ingredients, such as the corned beef or broth, to ensure they are gluten-free.

Q: Are there any vegetarian or vegan alternatives for this casserole?

A: Absolutely! If you’re looking for a vegetarian or vegan version of the casserole, you can substitute the corned beef with plant-based protein options like tempeh or seitan. Use vegetable broth instead of beef broth, and swap dairy-based ingredients with plant-based alternatives such as non-dairy milk and vegan cheese.

Now you have the key to unlocking the potential of your leftover corned beef. Embrace the versatility of this casserole and transform those leftovers into a hearty and delicious meal. With its rich flavors, comforting textures, and endless customization options, leftover corned beef casserole is sure to become a favorite in your recipe repertoire.


Leave a Comment