My Sunday meal prep ritual always includes whipping up a big batch of this savory bake to slice and reheat all week long. This corned beef hash breakfast casserole tastes even better after a night in the fridge, making busy mornings feel effortlessly delicious. It’s the kind of cozy, stick-to-your-ribs dish that turns a hectic weekday into something special. I love how it transforms simple, humble ingredients into a meal that feels like a warm hug. Whether you have leftover corned beef from a holiday dinner or you’re just craving that classic diner-style hash in a new, easy format, this casserole is your answer. It’s comfort food, made easy, and it brings everyone to the table with a smile. If you love hearty, one-dish meals, you might also enjoy this Cheesy Ground Beef Potato Casserole.
Table of Contents
Corned Beef Hash Breakfast Casserole
A savory, make-ahead breakfast bake that transforms simple ingredients into a cozy, stick-to-your-ribs meal. Perfect for using leftover corned beef or creating a special diner-style breakfast for busy mornings.
- Prep Time: 15min
- Cook Time: 45min
- Total Time: 1h
- Yield: 8 servings 1x
- Category: breakfast
- Method: baking
- Cuisine: American
Ingredients
- 1 tablespoon olive oil or butter
- 1 medium yellow onion, diced
- 1 red bell pepper, diced
- 3 cups cooked corned beef, chopped or shredded (about 12 ounces)
- 4 cups frozen shredded hash browns, thawed
- 6 large eggs
- 1 cup whole milk
- 1/2 cup sour cream
- 1 teaspoon garlic powder
- 1/2 teaspoon smoked paprika
- 1/4 teaspoon black pepper
- 2 cups shredded sharp cheddar cheese, divided
- Chopped fresh parsley or chives for garnish
Instructions
- Preheat oven to 375°F. Grease a 9×13 inch baking dish.
- In a large skillet, heat oil over medium heat. Add diced onion and bell pepper. Cook for 5-7 minutes until softened.
- In a large bowl, combine the sautéed veggies, chopped corned beef, and thawed hash browns. Mix well and transfer to the prepared baking dish, spreading evenly.
- In the same bowl, whisk together eggs, milk, sour cream, garlic powder, smoked paprika, and black pepper until smooth.
- Pour the egg mixture evenly over the corned beef and potato base in the dish.
- Sprinkle 1 1/2 cups of the shredded cheddar cheese over the top.
- Bake for 40-45 minutes, or until the center is set and the top is golden brown. Sprinkle with the remaining 1/2 cup of cheese during the last 5 minutes of baking.
- Let the casserole rest for 10 minutes before slicing. Garnish with fresh parsley or chives and serve.
Notes
Thaw hash browns completely to avoid a soggy casserole. Letting the bake rest for 10 minutes after cooking ensures clean slices. Reheats beautifully for meal prep.
Nutrition
- Serving Size: 8
- Calories: 380
- Sugar: 3
- Sodium: 850
- Fat: 24
- Saturated Fat: 11
- Unsaturated Fat: 10
- Trans Fat: 0.5
- Carbohydrates: 18
- Fiber: 2
- Protein: 25
- Cholesterol: 195
Ingredients List
This corned beef hash breakfast casserole recipe is all about simple ingredients coming together for maximum flavor. You likely have most of these in your pantry already.
- 1 tablespoon olive oil or butter
- 1 medium yellow onion, diced
- 1 red bell pepper, diced
- 3 cups cooked corned beef, chopped or shredded (about 12 ounces)
- 4 cups frozen shredded hash browns, thawed (or 3 cups diced boiled potatoes)
- 6 large eggs
- 1 cup whole milk
- 1/2 cup sour cream
- 1 teaspoon garlic powder
- 1/2 teaspoon smoked paprika
- 1/4 teaspoon black pepper
- 2 cups shredded sharp cheddar cheese, divided
- Chopped fresh parsley or chives for garnish
Smart Swaps: No corned beef? Use diced ham or cooked breakfast sausage. For a lighter touch, swap whole milk for 2% and use a reduced-fat cheese blend. If you’re avoiding dairy, unsweetened almond milk and a dairy-free cheese shred work well. This is one of those easy fast dinner recipes that’s wonderfully adaptable.
Timing
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
That’s about 20% faster than many layered breakfast bakes because we skip pre-cooking the potatoes. You get that golden, crispy top without the extra pan.
Step-by-Step Instructions
Making this corned beef hash breakfast casserole is a straightforward process that builds layers of flavor.
1. Sauté the Veggies: Preheat your oven to 375°F. In a large skillet, heat the oil over medium heat. Add the diced onion and bell pepper, cooking for 5-7 minutes until softened and fragrant. This step is key for building a flavorful base.
2. Combine the Base: In a large mixing bowl, combine the sautéed veggies, chopped corned beef, and thawed hash browns. Toss everything together until evenly mixed. Transfer this mixture to a greased 9×13 inch baking dish, spreading it into an even layer.
3. Make the Egg Custard: In the same bowl (fewer dishes!), whisk together the eggs, milk, sour cream, garlic powder, smoked paprika, and black pepper until smooth and well-combined. This creamy custard is what sets this bake apart from dry hash.
4. Assemble and Bake: Pour the egg mixture evenly over the corned beef and potato base. Top with 1 1/2 cups of the shredded cheddar cheese. Bake for 40-45 minutes, or until the center is set and the top is golden brown. Sprinkle with the remaining 1/2 cup of cheese during the last 5 minutes of baking for an extra melty finish.
5. Rest and Serve: Let the casserole rest for 10 minutes after pulling it from the oven. This allows the custard to fully set, making it easier to slice into perfect squares. Garnish with fresh parsley or chives before serving.
Nutritional Information
Per serving (based on 8 servings): Approximately 380 calories, 25g protein, 18g carbohydrates, 24g fat. This corned beef hash breakfast casserole is a protein-packed start to the day, thanks to the eggs and beef. The potatoes provide energy-sustaining carbs, while the cheese adds calcium. For a lighter version, see the swaps below.
Equipment Needed
You don’t need any fancy tools for this corned beef hash breakfast casserole. A trusty 9×13 inch baking dish, a large skillet for sautéing, a mixing bowl, and a whisk are all you need. A good chef’s knife for dicing the veggies and corned beef makes prep a breeze. Regular kitchen, regular time, great results.
Why You’ll Love This Recipe
- The Ultimate Make-Ahead Meal: It reheats beautifully, tasting even better the next day. Perfect for Sunday prep.
- Clears Out the Fridge: A brilliant way to use leftover holiday corned beef or that partial bag of hash browns.
- Feeds a Crowd Effortlessly: This casserole is designed for family-style serving, whether it’s a holiday brunch or a casual weekend breakfast.
- Customizable to Taste: Not a fan of bell peppers? Leave them out. Love spice? Add a diced jalapeño to the veggie sauté. It’s a forgiving recipe.
- Satisfying & Balanced: It has protein, carbs, and fat in every bite, keeping you full and happy for hours.
Healthier Alternatives for the Recipe
This corned beef hash breakfast casserole is easy to tweak for different dietary needs without losing its cozy soul.
- Lower-Carb / Keto: Swap the hash browns for 4 cups of riced cauliflower. Squeeze out excess moisture after cooking for the best texture.
- Higher-Protein: Increase the eggs to 8 and use 2% milk. You can also mix in a cup of cottage cheese with the egg custard for an extra protein boost.
- Dairy-Free: Use your favorite unsweetened plant-based milk, a dollop of dairy-free sour cream alternative, and dairy-free cheese shreds.
- Gluten-Free: This recipe is naturally gluten-free! Just double-check that your hash browns and corned beef don’t contain any added gluten-containing ingredients.
Serving Suggestions
This hearty corned beef hash breakfast casserole is a complete meal on its own, but a few simple sides can turn it into a feast. I love serving it with a bright, tangy side to cut through the richness. A simple arugula salad with lemon vinaigrette or a bowl of fresh fruit like berries or melon are perfect. For a true diner-style experience, add a dollop of sour cream and a few dashes of hot sauce. If you’re serving it for dinner, it pairs wonderfully with steamed green beans or roasted asparagus. Looking for other cozy, one-dish meals? You might also love my Spicy Southern Chicken Spaghetti Casserole for a similar comforting vibe.
Common Mistakes to Avoid
- Skipping the Veggie Sauté: Adding raw onions and peppers can make them crunchy and release too much water into the bake. Sautéing first concentrates their flavor.
- Using Frozen Hash Browns Straight from the Bag: Thaw them first! If they’re frozen, they’ll lower the temperature of the custard and can lead to a soggy, undercooked center. Spread them on a towel to drain any excess moisture.
- Overbaking the Eggs: The casserole is done when the center is just set. It will continue to cook as it rests. Overbaking can make the eggs rubbery.
- Not Letting it Rest: I know it’s tempting to dig right in, but those 10 minutes of rest are crucial for clean slices. It allows all the layers to settle and firm up.
Storing Tips for the Recipe
This corned beef hash breakfast casserole is a meal prep superstar.
- Refrigerator: Cool completely, then cover tightly with plastic wrap or transfer slices to an airtight container. It will keep for 3-4 days.
- Freezer: For longer storage, wrap the entire cooled casserole (or individual portions) tightly in plastic wrap and then aluminum foil. Freeze for up to 2 months. Thaw overnight in the fridge before reheating.
- Reheating: For the best texture, reheat slices in a toaster oven or conventional oven at 350°F until warmed through (about 10-15 minutes). The microwave works in a pinch but can make the potatoes a bit soft.
Conclusion
This corned beef hash breakfast casserole truly is your new favorite comfort food. It’s hearty, flavorful, and designed to make your life easier, whether you’re feeding a sleepy weekend crowd or prepping lunches for the week ahead. Simple ingredients, warm memories. I hope this recipe finds a regular spot in your kitchen rotation. When you make it, I’d love to hear how it turned out for you! Leave a comment below or share a photo and tag @Homestyletable on Pinterest. And if you’re looking for more easy, one-pan wonders, try my Spicy Southern Chicken Spaghetti Casserole or my Salsa Verde Chicken Rice Skillet for delicious weeknight inspiration. For a quick, flavor-packed meal in a bowl, check out this Quick Easy Korean Ground Beef Bowl.
FAQs about Corned Beef Hash Breakfast Casserole
Can you make corned beef hash ahead of time?
Yes, you can prepare the corned beef hash component of the casserole a day or two in advance. Store it in an airtight container in the refrigerator until you’re ready to assemble and bake the casserole.
What goes well with corned beef hash?
Corned beef hash pairs well with eggs (fried, poached, or scrambled), toast, hollandaise sauce, roasted vegetables, or a side of baked beans. In a casserole, it often includes eggs, cheese, and sometimes bread or potatoes.
How long does corned beef hash last in the fridge?
Cooked corned beef hash will last for 3-4 days in the refrigerator when stored properly in an airtight container.
How do you keep corned beef hash from being dry?
To prevent dryness, ensure the hash has enough moisture from the potatoes, corned beef fat, and potentially a touch of broth or butter. Don’t overcook it during the initial preparation or when baking the casserole. A layer of cheese on top of the casserole can also help retain moisture.
What is the best way to reheat corned beef hash?
The best ways to reheat corned beef hash are in a skillet over medium heat, stirring occasionally, until heated through; or in the microwave, covered, in short intervals until warmed through. For casserole leftovers, bake covered in a preheated oven at 350°F (175°C) until heated through.
Can you freeze corned beef hash breakfast casserole?
Yes, you can freeze a corned beef hash breakfast casserole, though the texture of the potatoes and eggs may change slightly. Wrap it tightly in plastic wrap and then aluminum foil, or store it in an airtight freezer-safe container. Thaw it overnight in the refrigerator before reheating.
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