Hashbrown Breakfast Casserole Recipe

Meet your new morning favorite: Hashbrown Breakfast Casserole! This cozy, crowd-pleasing dish brings all the best parts of breakfast—savory sausage, creamy eggs, crispy hashbrowns, and gooey cheese—together in one bubbling, golden casserole. Whether you want to feed a family brunch, meal prep for the week, or simply treat yourself to a decadent weekend breakfast, this Hashbrown Breakfast Casserole is both comforting and effortless. Each bite is deliciously packed with flavors, veggies, and textures that’ll leave everyone at the table asking for seconds.

Ingredients You’ll Need

Here’s what you’ll need to bring this hearty Hashbrown Breakfast Casserole to life. The ingredients are simple but each one is essential, offering pops of color, creamy texture, or bold flavors. Think of this as your breakfast toolkit—each item plays its part perfectly.

• Breakfast sausage: Use pork, turkey, or chicken sausage for rich, savory depth as the flavor foundation.
• Garlic: Freshly minced garlic adds irresistible aroma and just the right amount of punch.
• Red bell pepper: This brings a burst of color and subtle sweetness that balances the savory elements.
• Fresh spinach: Wilts beautifully and sneaks in extra greens for tenderness and nutrients.
• Large eggs: The star of the show—eggs hold everything together and make the casserole creamy and satisfying.
• Fine sea salt: Enhances all the flavors without overpowering anything.
• Ground black pepper: A subtle kick to round out the seasoning.
• Onion powder: Deepens the flavor with sweet, mellow onion notes.
• Dried parsley: Adds a gentle herbal freshness perfect for breakfast dishes.
• Oregano: Just a sprinkle offers Mediterranean flavor and earthiness.
• Milk of choice: Creams out the eggs—dairy or your favorite non-dairy option works.
• Shredded hashbrowns: Refrigerated hashbrowns offer a crisp bite and tender heartiness—skip frozen for the best texture.
• Shredded cheddar cheese: Melts into gooey deliciousness and brings a sharp, tangy note.
• Shredded parmesan cheese: For a salty, nutty complexity on top and throughout.
• Green onions: Sliced and sprinkled for color, freshness, and a mild oniony snap.

How to Make Hashbrown Breakfast Casserole

Step 1: Preheat and Prepare Your Pan

Start things off on the right foot by preheating your oven to 375ºF. Grab your favorite 9×13 inch baking dish and give it a generous coating of nonstick spray, butter, or oil. Not only will this keep your casserole from sticking, but it also leads to those perfectly crisp edges everyone loves.

Step 2: Brown the Sausage and Sauté the Veggies

In a large skillet over medium-high heat, brown your choice of breakfast sausage. Don’t be shy about breaking it up into crumbles as it cooks for better distribution later. Once it’s beautifully browned, drain any excess fat—this keeps things hearty, not greasy. Add the minced garlic and diced red bell pepper for about 5 minutes, just until fragrant and softened. Finally, toss in the fresh spinach, cover, and let it wilt down for about another 5 minutes. These layers create a savory, bright, and colorful base for your Hashbrown Breakfast Casserole.

Step 3: Mix Together the Egg Casserole Mixture

Time to build your flavor-packed batter! In a large bowl, vigorously whisk together the eggs, salt, pepper, onion powder, dried parsley, oregano, and your splash of milk. Once combined, fold in the cooked sausage-veggie mixture, shredded hashbrowns, cheddar, and parmesan cheese. You’ll see a lovely, textured mixture—this is what gives the casserole its signature heartiness and cheesy pull.

Step 4: Assemble and Bake

Pour your savory mixture into the prepared baking pan, then use a spatula to spread everything out evenly—this keeps your Hashbrown Breakfast Casserole baking up tender in the center and richly golden on the edges. Slide it into the oven and bake for 30 to 40 minutes, or until the middle is set and the top is gloriously golden. Scatter those green onions over the top as a fresh, crunchy finish.

How to Serve Hashbrown Breakfast Casserole

Garnishes

A final flourish of sliced green onions gives your Hashbrown Breakfast Casserole a gorgeous pop of color and a burst of mild, fresh flavor. If you’re feeling extra, try a sprinkle of chopped parsley or a tiny dusting of extra parmesan for even more wow-factor at the table.

Side Dishes

Pair each hearty square of your Hashbrown Breakfast Casserole with something light and refreshing—think a side of fresh fruit salad, crisp mixed greens, or even tangy pickled vegetables. Warm, buttered toast or flaky croissants are also great for soaking up every last bit.

Creative Ways to Present

Cut the casserole into neat squares for a classic family breakfast, or use a biscuit cutter to make circles for an elegant brunch spread. You can even layer it into breakfast sandwiches with a soft roll or bagel, or pack into small jars or containers for grab-and-go mornings.

Make Ahead and Storage

Storing Leftovers

Leftover Hashbrown Breakfast Casserole keeps beautifully. Cover the cooled casserole with foil or transfer individual portions into airtight containers. Store in the refrigerator for up to four days—the flavors just keep getting better!

Freezing

To freeze, let the casserole cool completely. Slice into portions or freeze whole, tightly wrapped in foil and a freezer bag. This Hashbrown Breakfast Casserole can be stored in the freezer for two to three months—just thaw overnight before reheating.

Reheating

For best results, reheat individual slices in the microwave for a minute or two until warmed through. For larger quantities, cover with foil and warm in a 350ºF oven until hot and bubbly. This keeps the texture moist and the top golden without drying out the eggs or potatoes.

FAQs

Can I make Hashbrown Breakfast Casserole the night before?

Absolutely! Prepare the casserole up through step 3, cover, and refrigerate overnight. The next morning, just bake as directed. This is perfect for holidays or brunch entertaining.

Can I use frozen hashbrowns instead of refrigerated?

Refrigerated hashbrowns give the best texture, but if you’re using frozen, make sure they’re completely thawed and drained of any excess moisture to avoid a watery casserole.

Can I make this casserole vegetarian?

Definitely! Swap the sausage for a plant-based sausage or sautéed mushrooms and increase the spinach or other veggies. The casserole remains hearty and satisfying.

What types of cheese work best in Hashbrown Breakfast Casserole?

Cheddar and parmesan are a classic combo, but you can also try Monterey Jack, mozzarella, or even a sprinkle of feta for a twist. Mix and match to suit your taste!

Do I have to include spinach and bell pepper?

Not at all! The spinach and bell pepper add lovely color and nutrition, but you can substitute with other favorite veggies—think diced zucchini, broccoli, or even sun-dried tomatoes.

Final Thoughts

If you’re looking for a comforting, all-in-one breakfast to share with friends or family, Hashbrown Breakfast Casserole simply never disappoints. Try it once, and you’ll see why it’s an absolute keeper—warming, flavorful, and guaranteed to become your new go-to brunch favorite!

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