Corned Beef and Potato Casserole is a warm, comforting dish made with tender sliced potatoes, savory corned beef, sweet onion, and a simple buttery seasoning. It is an easy meal that turns a few everyday ingredients into a filling dinner the whole family can enjoy.
The potatoes become soft in the center and golden around the edges, while the corned beef adds its rich, salty flavor throughout the casserole. Thinly sliced onions melt into the layers as everything bakes together, creating a simple dish that feels cozy, hearty, and satisfying.
This recipe is perfect for using leftover corned beef, especially after a holiday meal. It also works well with canned corned beef or deli-style corned beef when you need a quick dinner. Serve it with a crisp salad, steamed vegetables, or a side of buttery cabbage for a complete meal.
Why You Will Love This Recipe
Corned Beef and Potato Casserole is made with affordable, easy-to-find ingredients. There is no need for complicated sauces or special equipment, and the oven does most of the work.
It is also a great make-ahead meal. You can prepare the casserole earlier in the day, refrigerate it, then bake it when dinner time arrives. Leftovers warm up well too, making this recipe a practical option for meal prep.
The flavor is simple but delicious. The potatoes absorb the savory juices from the corned beef and onion, while the top becomes lightly golden and crisp. Every serving has tender potatoes and flavorful corned beef in one bite.
Recipe Information
Prep time: 20 minutes
Bake time: 45 to 55 minutes
Total time: About 1 hour 15 minutes
Servings: 6 to 8
Difficulty: Easy
Best for: Family dinner, leftovers, and meal prep
Ingredients
4 cups cooked corned beef, shredded or finely chopped
2 pounds Yukon Gold or russet potatoes
1 large yellow onion, thinly sliced
3 tablespoons butter, melted
1 tablespoon olive oil
1 cup beef broth
1 teaspoon garlic powder
1 teaspoon onion powder
1/2 teaspoon smoked paprika
1/2 teaspoon black pepper
1/4 teaspoon salt, or to taste
1 tablespoon Worcestershire sauce
1 tablespoon chopped fresh parsley, optional
1 cup shredded Swiss cheese, optional
1/2 cup shredded mozzarella cheese, optional
Choosing the Best Ingredients
Yukon Gold potatoes are a great choice because they have a creamy texture and hold their shape well while baking. Russet potatoes also work, but they are slightly more starchy and can become softer. Slice the potatoes thinly and evenly so every layer cooks at the same time.
Use cooked corned beef that has been shredded or finely chopped. Leftover corned beef brisket is ideal because it is tender and full of flavor. If your leftover corned beef is very salty, taste it before adding extra salt to the casserole.
Yellow onions add mild sweetness as they bake. You can use white onions instead, but yellow onions give the best balance with the rich corned beef. Slice them thinly so they soften into the casserole rather than staying firm.
Beef broth adds moisture and gives the potatoes a deeper flavor. Choose low-sodium beef broth when possible because corned beef already contains salt. You can add more seasoning later if necessary.
How to Make Corned Beef and Potato Casserole
Preheat your oven to 375°F. Grease a 9-by-13-inch baking dish with butter, olive oil, or cooking spray.
Wash the potatoes well and slice them into thin rounds, about 1/8 inch thick. A mandoline slicer can help create even slices, but a sharp knife also works well. Try to keep the slices close to the same thickness so they bake evenly.
Place the sliced potatoes in a large bowl. Drizzle them with the melted butter and olive oil. Add garlic powder, onion powder, smoked paprika, black pepper, and a small amount of salt. Toss gently until the potatoes are evenly coated.
Arrange half of the potato slices in the bottom of the prepared baking dish. Overlap the slices slightly to create an even layer.
Spread half of the chopped corned beef over the potatoes. Add half of the sliced onions over the corned beef. Repeat with the remaining potatoes, corned beef, and onions.
In a small bowl, combine the beef broth and Worcestershire sauce. Pour the mixture evenly around the edges of the casserole dish. This helps steam the potatoes while baking and keeps the casserole moist.
Cover the dish tightly with foil. Bake for 35 minutes. Remove the foil carefully, then check the potatoes with a fork. If they are still firm, cover the dish again and bake for another 10 minutes.
Once the potatoes are tender, remove the foil. If you are adding cheese, sprinkle Swiss and mozzarella cheese evenly over the top. Return the casserole to the oven uncovered for 10 to 15 minutes, until the top is lightly golden and the cheese is melted.
Let the casserole rest for 10 minutes before serving. This allows the layers to settle and makes it easier to scoop into clean portions. Garnish with fresh parsley if desired.
Tips for the Best Casserole
Slice the potatoes thinly. Thick potato slices may remain firm while the rest of the casserole is ready. Thin slices cook evenly and create the best layered texture.
Do not add too much salt at the beginning. Corned beef is naturally salty, so it is best to season lightly first and adjust after baking if needed.
Covering the dish during the first part of baking is important. The foil traps steam and helps the potatoes become soft and tender. Removing the foil at the end allows the top layer to brown.
For a crispier potato topping, brush the top potato layer with a little extra melted butter before baking uncovered. You can also broil the casserole for one or two minutes at the end, but watch it closely so it does not burn.
Let the casserole rest before serving. The potatoes need a few minutes to absorb the sauce, and the layers will hold together much better after resting.
Easy Variations
For a cheesy version, add Swiss cheese, mozzarella, cheddar, or Monterey Jack before the final bake. Swiss cheese is especially good with corned beef because it has a mild nutty flavor that complements the meat.
For a creamy casserole, stir 1/2 cup of sour cream or cream of mushroom soup into the beef broth mixture before pouring it into the dish. This creates a richer sauce around the potatoes.
For a corned beef and cabbage version, add two cups of finely shredded cabbage between the layers. The cabbage becomes tender while baking and pairs naturally with the corned beef.
For a breakfast-style casserole, add diced cooked bacon, chopped bell pepper, and a layer of shredded cheese. Serve it with fried or scrambled eggs for a hearty weekend breakfast.
For a little heat, add crushed red pepper flakes, diced jalapeños, or a few drops of hot sauce to the broth mixture.
What to Serve with Corned Beef and Potato Casserole
A fresh green salad is one of the best sides for this rich casserole. Crisp lettuce, cucumbers, tomatoes, and a light vinaigrette bring a refreshing contrast to the savory potatoes and corned beef.
Steamed green beans, broccoli, carrots, or peas also work beautifully. If you want a more traditional pairing, serve the casserole with sautéed cabbage, roasted carrots, or pickled vegetables.
Crusty bread or dinner rolls are useful for soaking up the flavorful juices at the bottom of the baking dish. For a simple family dinner, you can serve this casserole with just a salad and bread.
Make-Ahead Instructions
This casserole is easy to prepare in advance. Assemble the potatoes, corned beef, and onions in the baking dish, then cover tightly and refrigerate for up to 24 hours.
Keep the broth mixture separate until you are ready to bake. Pour it around the edges just before placing the dish in the oven. This keeps the potatoes from soaking up too much liquid while resting in the refrigerator.
Because the casserole will be cold, add about 10 extra minutes to the covered baking time. Check that the potatoes are fork-tender before removing the foil and adding cheese.
Storing Leftovers
Store leftover Corned Beef and Potato Casserole in an airtight container in the refrigerator for up to three days. Allow it to cool slightly before covering and refrigerating.
To reheat one serving, place it on a microwave-safe plate and heat in short intervals until hot. Add a small splash of beef broth if the potatoes seem dry.
For a larger portion, place the casserole in an oven-safe dish, cover with foil, and bake at 350°F for 15 to 20 minutes. Remove the foil during the last few minutes if you want the potatoes to crisp slightly on top.
Can You Freeze This Casserole?
Yes, you can freeze this casserole after baking. Let it cool completely, then divide it into portions or freeze the whole dish in a freezer-safe container. Freeze for up to two months.
Thaw overnight in the refrigerator before reheating. Warm it in a 350°F oven until the center is hot. The potatoes may be softer after freezing, but the casserole will still taste delicious.
For the best freezer results, do not add fresh parsley until after reheating. Add it just before serving for a fresh finish.
Common Mistakes to Avoid
Do not use thick potato slices. Thick slices take longer to soften and can leave the casserole unevenly cooked. Thin, even slices are the key to success.
Avoid adding too much liquid. The casserole needs enough broth to steam the potatoes, but too much can make it watery. Use the amount listed and only add more if the potatoes seem dry during baking.
Do not bake uncovered from the beginning. The potatoes need steam to become tender. Covering the dish first gives you soft potatoes, while uncovering it later creates the golden top.
Avoid overbaking after adding cheese. Once the cheese is melted and lightly browned, remove the casserole from the oven. Too much heat can make the cheese greasy or overly dark.
Frequently Asked Questions
Can I use canned corned beef?
Yes. Canned corned beef works well in this recipe. Break it into small pieces and layer it with the potatoes. Keep in mind that canned corned beef can be salty, so season the potatoes lightly.
Can I use leftover mashed potatoes?
This recipe is best with sliced potatoes because they create the layered texture shown in the casserole. However, you can use mashed potatoes as a topping for a corned beef bake, similar to a shepherd’s pie.
Do I need to peel the potatoes?
No. You can leave the skins on Yukon Gold potatoes if they are washed well. The skins add texture and save preparation time. Peel russet potatoes if you prefer a smoother texture.
How do I know when the potatoes are done?
Insert a fork or thin knife into the center of the casserole. It should slide easily through the potatoes without resistance. If the potatoes are still firm, cover the dish again and continue baking.
Can I add vegetables?
Yes. Shredded cabbage, carrots, mushrooms, bell peppers, peas, and spinach are all good additions. Add sturdy vegetables like carrots and cabbage in thin pieces so they cook at the same rate as the potatoes.
Final Thoughts
Corned Beef and Potato Casserole is a simple, hearty recipe that makes the most of comforting ingredients. Tender potatoes, savory corned beef, sweet onion, and a flavorful broth come together in one warm baking dish that is easy to prepare and satisfying to serve.
It is ideal for leftover corned beef, family dinners, meal prep, and cozy weekends at home. Keep it classic with potatoes and onions, or customize it with cheese, cabbage, vegetables, or a creamy sauce. Once you try this easy casserole, it may become one of your favorite ways to serve corned beef.