Corned Beef and Potato Casserole: A Hearty Step-by-Step Comfort Food Recipe

Corned Beef and Potato Casserole is a warm, filling, and flavorful dish made with tender potatoes, savory corned beef, creamy sauce, melted cheese, and simple seasonings. It is the kind of recipe that turns basic ingredients into a satisfying family meal. The potatoes become soft and creamy, the corned beef adds a salty richness, and the baked cheese topping gives the casserole a golden, comforting finish.

This dish is perfect for dinner, brunch, potlucks, holidays, or using leftover corned beef. It is easy to prepare, budget-friendly, and can be served as a complete meal with only a simple salad or vegetables on the side.

Why This Casserole Is So Good

The best thing about Corned Beef and Potato Casserole is the balance of texture and flavor. Potatoes make the base hearty and soft, corned beef adds deep savory flavor, onions bring sweetness, and the creamy sauce ties everything together.

When baked, the top becomes golden and slightly crisp while the inside stays rich, creamy, and tender. It tastes like a mix between loaded potatoes, corned beef hash, and a cheesy baked casserole.

Ingredients

Main Ingredients

4 large potatoes, peeled and thinly sliced or diced
2 cups cooked corned beef, chopped or shredded
1 medium onion, finely chopped
2 cloves garlic, minced
2 tablespoons butter
1 tablespoon olive oil
1 cup shredded cheddar cheese
½ cup mozzarella cheese, optional
2 tablespoons chopped parsley, optional

For the Creamy Sauce

1 ½ cups milk
½ cup heavy cream
2 tablespoons all-purpose flour
2 tablespoons butter
½ teaspoon black pepper
½ teaspoon garlic powder
½ teaspoon onion powder
½ teaspoon paprika
¼ teaspoon mustard powder, optional
Salt to taste

Be careful with salt because corned beef is already salty.

Step 1: Prepare the Potatoes

Start by washing and peeling the potatoes. You can slice them thinly for a layered casserole or dice them into small cubes for a more rustic texture.

If you want a soft, creamy casserole, slice the potatoes thinly. If you want a heartier bite, dice them.

Place the potatoes in a pot of salted water and boil for 8 to 10 minutes, just until slightly tender. Do not fully cook them because they will continue baking in the oven.

Drain the potatoes and set them aside.

Step 2: Prepare the Corned Beef

Use cooked corned beef and chop or shred it into small pieces.

If you are using leftover corned beef, remove any large fatty pieces before chopping. If you are using canned corned beef, break it apart gently with a fork.

The corned beef should be in bite-sized pieces so it spreads evenly throughout the casserole.