
Give it up, my sweet friend! You cannot resist the temptation of this Corned Beef Casserole.
It’s calling your name from the oven. I can hear it now!
This is not just any old dinner. This is a hug in a baking dish. It’s creamy, savory, and packed with flavor that will make your taste buds do a happy dance.
We’re talking about the ultimate comfort food mash-up. Imagine all the best parts of your favorite diner meal, baked into one incredible, easy-to-make masterpiece.
Are you ready for this? Let’s go!
Corned Beef Casserole Recipe

Let’s Get Your Ingredients Ready
Bringing This Recipe to Life (Step-by-Step)
Notes
Enjoy your homemade Corned Beef Casserole Recipe!
Recipe Overview
- Cuisine: American/Irish-Inspired
- Category: Main Dish
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- Servings: 6 hungry people
Do You Love This Recipe Too?
I am completely obsessed with this dish. It all started with my grandma.
She used to make it after St. Patrick’s Day with the leftover corned beef. It was her secret weapon for a crazy-busy weeknight.
One bite and I was hooked for life. The creamy sauce, the salty beef, that crispy topping… it’s pure magic.
Now, I make it year-round. It’s my go-to when I need a dinner that feels like a celebration but cooks like a dream.
This recipe is my love letter to her. And to you!
My Shopping List for This Recipe
Okay, team! Let’s talk ingredients. This is where the fun begins.
You probably have most of this in your pantry right now. That’s the beauty of it!
We’re building layers of flavor with simple, amazing stuff.
Let’s Get Your Ingredients Ready
Grab a big bowl and let’s line everything up. Mise en place, baby! It makes the process so smooth.
- 1 tablespoon olive oil or butter
- 1 medium yellow onion, diced
- 2 cloves garlic, minced
- 12 oz canned corned beef, broken into chunks
- 1 (10.5 oz) can cream of mushroom soup
- 1 cup sour cream
- 1/4 cup milk
- 1 teaspoon Worcestershire sauce
- 1/2 teaspoon black pepper
- 3 cups frozen shredded hash browns (thawed)
- 2 cups shredded cheddar cheese, divided
- 1 cup frozen peas and carrots mix (no need to thaw)
- 1 1/2 cups crispy fried onions (for the topping!)
Bringing This Recipe to Life (Step-by-Step)
Here we go! The magic happens right here. Follow these steps and you’ll be a casserole hero.
- Preheat your oven to 375°F (190°C). Grab a 9×13 inch baking dish and give it a light spray. Let’s get it hot!
- Heat the oil in a skillet over medium heat. Add your diced onion and cook for about 5 minutes until it’s soft and sweet. Throw in the garlic for the last 30 seconds. Your kitchen will smell incredible.
- In a massive mixing bowl, combine the cooked onions and garlic with the corned beef, cream of mushroom soup, sour cream, milk, Worcestershire, and black pepper. Mix it all together until it’s one happy, creamy family.
- Now, gently fold in the thawed hash browns, 1 1/2 cups of the cheddar cheese, and the frozen peas and carrots. Be gentle! We want to keep some texture.
- Pour this glorious mixture into your prepared baking dish. Spread it out into a nice, even layer. This is your canvas!
- Sprinkle the remaining 1/2 cup of cheddar cheese over the top. Then, cover the whole thing with that glorious can of crispy fried onions. This is the golden crown!
- Bake for 40-45 minutes. You want it bubbly around the edges and golden brown on top. Trust me, the wait is the hardest part.
- Take it out and let it sit for 5-10 minutes before serving. This lets everything set up perfectly. Dig in!
Fun Variations to Try Next Time
Feel like mixing it up? Go for it! This recipe is your playground.
Here are a few of my favorite twists.
Cheese Swap: Try using Swiss or Gruyère cheese instead of cheddar for a more sophisticated, nutty flavor. It’s so good!
Spice It Up: Add a diced jalapeño to the onion mix or a dash of hot sauce into the creamy filling. A little kick makes everything better.
Veggie Power: Swap the peas and carrots for chopped broccoli florets or cauliflower. It’s a great way to clean out the fridge!
How to Store, Freeze, and Reheat
This casserole is a fantastic make-ahead meal. Let’s talk leftovers!
To store, let it cool completely. Cover tightly or transfer portions to airtight containers.
It will keep in the fridge for 3-4 days. The flavors get even better!
To freeze, wrap the cooled casserole (or individual portions) tightly in plastic wrap and then foil. It freezes beautifully for up to 3 months.
Thaw overnight in the fridge before reheating.
Reheat in the microwave for single servings. For larger portions, cover with foil and warm in a 350°F oven until heated through. Add a few extra fried onions on top after heating for that fresh crunch!
NUTRITION INFORMATION
- Calories: ~480
- Carbohydrates: 28g
- Protein: 22g
- Fat: 32g
- Saturated Fat: 14g
- Cholesterol: 85mg
- Sodium: 1180mg
- Fiber: 2g
- Sugar: 4g
*Nutrition is an estimate per serving. It will vary based on your specific ingredients.
A Quick Q&A on This Recipe
I get asked these questions all the time. Here are my quick answers!
Can I use leftover homemade corned beef?
Absolutely! That’s the best way. Just shred or chop about 2 cups of cooked corned beef and use it instead of the canned. The flavor is next-level amazing.
My family doesn’t like mushrooms. Help!
No problem at all! Cream of celery or cream of chicken soup works perfectly here. Use what your people love. The goal is that creamy, dreamy base.
Do I have to thaw the hash browns?
Yes, I really recommend it. Thawing them helps the casserole cook evenly and prevents a soggy bottom. Just pop the bag in the fridge the night before, or spread them on a plate for 30 minutes.
There you have it! My ultimate, soul-satisfying, crowd-pleasing casserole.
It’s the dinner hero you’ve been searching for. Easy, fast, and packed with so much love and flavor.
I can’t wait to hear how yours turns out! Please leave a comment and a rating below to let me know what you think!

