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Quick Recipe Info
I appreciate recipes that don’t require a lot of effort but still deliver big flavor, and this casserole checks every box. It’s filling enough for breakfast yet satisfying enough to enjoy for brunch or even breakfast-for-dinner.
| Prep Time | 15 minutes |
| Cook Time | 50 minutes |
| Total Time | 1 hour 5 minutes |
| Servings | 8 |
| Calories | Approximately 430 per serving |
| Protein | 23g |
| Gluten-Free | Yes (using certified gluten-free sausage and hash browns) |
| Dairy-Free | No |
| Vegan | No |
| Meal Prep Friendly | Yes |
Why You’ll Love This Recipe
One of my favorite things about this casserole is how dependable it is. I’ve made it for holiday mornings, meal prep, potlucks, and lazy weekends, and it always disappears quickly.
- High in protein to keep you full for hours
- Uses simple grocery store ingredients
- Great for holiday breakfasts and brunches
- Easy enough for beginner cooks
- Perfect for making ahead
- Family-friendly and kid-approved
- Freezer-friendly
- Naturally gluten-free with the right ingredients
- Easily customized with vegetables or different cheeses
- Bakes in one dish for easy cleanup
Ingredients You’ll Need
This recipe uses everyday ingredients that work beautifully together. Each one has an important job, creating a casserole that’s creamy, flavorful, and perfectly balanced.
Frozen Hash Browns – 1 (30-ounce) bag, thawed
I like using shredded frozen hash browns because they become tender inside while developing delicious crispy edges. Letting them thaw first helps prevent excess moisture in the casserole.
Breakfast Sausage – 1 pound
Pork breakfast sausage adds plenty of savory flavor throughout the dish. Mild sausage keeps the casserole family-friendly, while spicy sausage gives it a little extra kick.
Large Eggs – 8
The eggs hold everything together and bake into a fluffy, custard-like texture. Fresh eggs provide the richest flavor and best consistency.
Whole Milk – 1 cup
Milk lightens the egg mixture so it stays soft and creamy instead of becoming dense. Whole milk creates the richest texture, but 2% also works well.
Sharp Cheddar Cheese – 2 cups, shredded
Sharp cheddar melts beautifully and adds bold cheesy flavor throughout the casserole. I recommend shredding your own cheese for the smoothest melt.
Mozzarella Cheese – 1 cup, shredded
Mozzarella adds extra creaminess and gives the casserole those irresistible stretchy cheese pulls.
Yellow Onion – ½ cup, diced
A small amount of onion adds sweetness and depth without overpowering the other ingredients.
Garlic Powder – 1 teaspoon
Garlic powder evenly seasons the casserole and blends perfectly into the egg mixture.
Onion Powder – 1 teaspoon
This boosts the savory flavor and complements the fresh onion.
Salt – 1 teaspoon
Salt enhances every ingredient and balances the richness of the eggs and cheese.
Black Pepper – ½ teaspoon
Freshly ground black pepper adds gentle warmth without making the casserole spicy.
Paprika – ½ teaspoon
Paprika contributes a subtle smoky flavor while giving the top a beautiful golden color.
Butter – 1 tablespoon
Greasing the baking dish with butter helps prevent sticking while adding another layer of rich flavor.
Optional Add-Ins
These ingredients aren’t necessary, but they’re wonderful if you want to change things up.
- 1 cup diced bell peppers
- 1 cup sautéed mushrooms
- ½ cup chopped green onions
- 1 cup fresh spinach
- ½ teaspoon crushed red pepper flakes
- 4 slices cooked bacon, crumbled
- ½ cup diced jalapeños for extra heat
If you enjoy hearty breakfast recipes, my Slow Cooker French Toast Casserole makes another fantastic brunch centerpiece for holidays or weekends. It’s a great sweet option to pair with this savory casserole.
Tools For This Recipe
These are the kitchen tools I use most often when making this recipe.
- 9×13-inch baking dish – https://www.amazon.com/dp/B0000CF66W
- Large nonstick skillet – https://www.amazon.com/dp/B00PCI71TS
- Mixing bowls – https://www.amazon.com/dp/B0000VLQ4C
- Box grater for shredding cheese – https://www.amazon.com/dp/B00004OCJW
- Silicone spatula – https://www.amazon.com/dp/B01N5JUPPV
- Whisk – https://www.amazon.com/dp/B00004OCNJ
As an Amazon Associate, I earn from qualifying purchases.
How to Make It
I love how quickly this recipe comes together. Once everything is mixed, the oven does the rest of the work, filling the kitchen with an amazing breakfast aroma.
Step 1: Prepare the Oven and Baking Dish
Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with 1 tablespoon butter, making sure to coat the bottom and sides so the casserole releases easily after baking.
Step 2: Brown the Sausage
Place 1 pound breakfast sausage in a large skillet over medium heat. Cook for about 7–8 minutes, breaking it into crumbles as it browns. Add the ½ cup diced onion during the last few minutes and cook until softened. Drain any excess grease before setting aside.
Step 3: Prepare the Egg Mixture
In a large mixing bowl, whisk together:
- 8 large eggs
- 1 cup whole milk
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- 1 teaspoon salt
- ½ teaspoon black pepper
- ½ teaspoon paprika
Whisk until the eggs are fully blended and slightly frothy.
Step 4: Assemble the Casserole
Spread the 30-ounce thawed hash browns evenly into the prepared baking dish. Sprinkle the cooked sausage and onions evenly over the potatoes.
Top with 2 cups shredded cheddar cheese and 1 cup mozzarella cheese, making sure they’re distributed evenly across the pan.
Slowly pour the egg mixture over everything, allowing it to soak down through the layers. Use a spatula to gently press the ingredients into the liquid if needed so every bite bakes evenly.
Step 5: Bake Until Golden and Set
Place the casserole in the preheated 375°F (190°C) oven and bake for 45–50 minutes. You’ll know it’s ready when the center is fully set, the edges are lightly golden, and the cheese is bubbling beautifully. If the top starts browning too quickly, loosely cover it with foil for the final 10 minutes.
Step 6: Let It Rest Before Serving
Remove the casserole from the oven and let it rest for 10 minutes before slicing. This gives the eggs time to firm up, making each serving easy to cut while keeping the inside tender and creamy.
Substitutions
I often adjust this casserole depending on what’s already in my refrigerator. It’s one of those forgiving recipes that still turns out delicious with a few simple swaps.
Instead of Breakfast Sausage
Ground turkey sausage or chicken sausage both work wonderfully if you’re looking for a lighter option. They still provide plenty of savory flavor while reducing the overall fat content.
Instead of Hash Browns
Frozen diced potatoes make an excellent substitute if you prefer a chunkier texture. You can also use leftover roasted breakfast potatoes, although the casserole will be slightly firmer.
Instead of Cheddar Cheese
Colby Jack, Monterey Jack, Pepper Jack, or a Mexican cheese blend all melt beautifully. Pepper Jack is my favorite whenever I want a little extra spice.
Instead of Whole Milk
Two-percent milk works well without changing the texture very much. Half-and-half creates an even richer casserole that’s perfect for holiday breakfasts.
Add More Vegetables
Bell peppers, mushrooms, spinach, broccoli, zucchini, or kale all blend nicely into this recipe. I recommend sautéing vegetables with higher water content before adding them so the casserole doesn’t become watery.
Meal Prep Tips
This recipe has saved me on countless busy mornings because it’s incredibly meal-prep friendly. A little planning means breakfast is ready in just a few minutes all week.
You can assemble the entire casserole the night before, cover it tightly, and refrigerate overnight. The next morning, simply let it sit at room temperature for about 20 minutes while the oven preheats before baking as directed.
After baking, divide the casserole into individual portions and store them in airtight meal prep containers. It stays fresh in the refrigerator for up to 4 days, making weekday breakfasts almost effortless.
If you’re looking for even more make-ahead breakfast ideas, my Vegetable Egg Muffins are another favorite because they’re easy to freeze and perfect for grab-and-go mornings.
Easy Variations
One of my favorite things about this recipe is how easy it is to customize. Small changes can completely transform the flavor while keeping the same simple preparation.
Higher Protein Version
Add an extra 4 eggs and replace half of the hash browns with 1 cup cottage cheese. You’ll get an even creamier texture along with a noticeable protein boost.
Spicy Version
Use hot breakfast sausage instead of mild, stir in ½ teaspoon crushed red pepper flakes, and add diced jalapeños before baking. Finish with Pepper Jack cheese for even more flavor.
Extra Veggie Version
Mix in sautéed spinach, mushrooms, bell peppers, zucchini, and onions. The vegetables add color, texture, and extra nutrition while keeping the casserole hearty.
Bacon Lover’s Version
Replace half of the sausage with 6 slices of crispy bacon, crumbled into the casserole before baking. The combination of smoky bacon and savory sausage is absolutely delicious.
Southwest Version
Mix in diced green chiles, black beans, Pepper Jack cheese, and a sprinkle of taco seasoning. Serve with salsa and sliced avocado for a fun brunch twist.
Serving Ideas
I usually serve this casserole with a few simple sides that balance its rich, cheesy flavor. Whether it’s a holiday brunch or a regular weekend breakfast, these pairings make the meal feel complete without adding much extra work.
For a fresh contrast, serve each slice with a bowl of seasonal fruit or a light green salad. If you’re hosting brunch, a pitcher of orange juice or fresh coffee rounds everything out perfectly.
I also love pairing it with fluffy pancakes or something sweet like our Slow Cooker French Toast Casserole when feeding a crowd. The combination of savory and sweet is always a hit.
For busy weekday mornings, enjoy a slice alongside one of these Breakfast Smoothies. It’s an easy way to add fruit and make breakfast even more filling.
If you’re planning a high-protein breakfast, serve this casserole with fresh avocado slices, Greek yogurt, or a simple fruit parfait for extra nutrition.
Storage and Leftovers
I almost always make a full casserole because the leftovers reheat beautifully. Having breakfast already prepared makes hectic mornings so much easier.
Refrigerator Storage
Allow the casserole to cool completely before covering the baking dish or transferring individual portions to airtight containers. Store in the refrigerator for up to 4 days.
Freezer Storage
This casserole freezes exceptionally well. Wrap individual portions tightly in plastic wrap and place them in a freezer-safe container or zip-top freezer bag. Freeze for up to 3 months.
To thaw, transfer a portion to the refrigerator overnight before reheating.
Reheating Instructions
For the best texture, warm individual slices in a 350°F oven for about 10–15 minutes.
If you’re short on time, microwave a slice for 1–2 minutes, adding another 20–30 seconds if needed until heated through.
Tried This Recipe?
Leave a review, I love hearing your feedback! ⭐⭐⭐⭐⭐
Breakfast Casserole with Hash Browns, Eggs and Sausage
This hearty breakfast casserole combines crispy hash browns, fluffy eggs, savory breakfast sausage, and plenty of melted cheese into one comforting dish. It’s perfect for holiday mornings, weekend brunches, or meal prep since it can be assembled ahead of time and baked when you’re ready.
Ingredients
- 1 (30-ounce) bag frozen shredded hash browns, thawed
- 1 pound breakfast sausage
- 8 large eggs
- 1 cup whole milk
- 2 cups sharp cheddar cheese, shredded
- 1 cup mozzarella cheese, shredded
- ½ cup yellow onion, diced
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- 1 teaspoon salt
- ½ teaspoon black pepper
- ½ teaspoon paprika
- 1 tablespoon butter (for greasing the baking dish)
Tools For This Recipe
(Amazon affiliate links*) – Check out all of my kitchen essentials here.
- 9×13-inch Baking Dish – Ensures the casserole bakes evenly with perfectly golden edges.
- Large Nonstick Skillet – Ideal for browning the sausage and sautéing the onions.
- Balloon Whisk – Helps create a smooth, fluffy egg mixture in seconds.
Instructions
- Preheat the oven to 375°F (190°C) and grease a 9×13-inch baking dish with butter.
- Brown the breakfast sausage in a skillet over medium heat. Add the diced onion during the last few minutes of cooking, then drain any excess grease.
- In a large bowl, whisk together the eggs, milk, garlic powder, onion powder, salt, black pepper, and paprika.
- Spread the thawed hash browns evenly into the prepared baking dish.
- Sprinkle the cooked sausage and onions over the hash browns.
- Add the shredded cheddar and mozzarella cheeses evenly over the top.
- Pour the egg mixture evenly over all the ingredients.
- Bake for 45–50 minutes, or until the center is set and the top is lightly golden.
- Let the casserole rest for 10 minutes before slicing and serving.
Notes
Pro Tips:
- Thaw the hash browns before assembling the casserole to prevent excess moisture.
- Freshly shredded cheese melts smoother than pre-shredded cheese.
- For extra flavor, add diced bell peppers, spinach, mushrooms, or jalapeños before baking.
- Letting the casserole rest after baking makes it much easier to slice cleanly.
Make Ahead Method:
- Assemble the casserole up to 24 hours in advance, cover tightly, and refrigerate. Bake fresh the next morning as directed.
Storage:
- Store leftovers in an airtight container in the refrigerator for up to 4 days or freeze individual portions for up to 3 months.
Nutritional information is an estimate and is per serving. This recipe makes 8 servings.
Nutrition
Calories: 430kcal, Carbohydrates: 20g, Protein: 23g, Fat: 28g, Saturated Fat: 11g, Polyunsaturated Fat: 2g, Monounsaturated Fat: 10g, Trans Fat: 0.2g, Cholesterol: 245mg, Sodium: 860mg, Potassium: 540mg, Fiber: 2g, Sugar: 2g, Vitamin A: 820IU, Vitamin C: 8mg, Calcium: 380mg, Iron: 2mg
Common Questions
Can I make this breakfast casserole the night before?
Absolutely. In fact, I often prepare everything the evening before, cover the baking dish, and refrigerate it overnight. The next morning, I simply let it sit on the counter for about 20 minutes while the oven preheats before baking as directed.
Can I freeze the casserole before baking?
Yes. Assemble the casserole without baking, wrap it tightly with plastic wrap and aluminum foil, and freeze for up to 2 months. Thaw overnight in the refrigerator before baking.
Should I thaw the hash browns first?
Yes. Thawing the hash browns helps remove excess moisture, which keeps the casserole from becoming watery and helps it bake evenly.
What cheese melts best in this recipe?
Sharp cheddar provides the best flavor, while mozzarella adds a creamy, stretchy texture. Monterey Jack, Colby Jack, or Pepper Jack are also excellent choices.
How do I know when the casserole is done?
The center should be completely set and no longer jiggle when you gently shake the baking dish. A knife inserted into the center should come out mostly clean, and the top should be lightly golden.
Can I add vegetables?
Definitely. Bell peppers, spinach, mushrooms, broccoli, zucchini, and green onions all work well. I recommend sautéing vegetables that contain a lot of moisture before adding them to the casserole.
Can I make this without sausage?
Yes. You can substitute cooked bacon, diced ham, turkey sausage, or simply load it up with vegetables for a delicious meatless version.
Final Thoughts
This breakfast casserole with hash browns, eggs, and sausage has become one of those dependable recipes I know will always turn out well. It’s simple enough for a regular Sunday breakfast but special enough for Christmas morning, Easter brunch, or any gathering with family and friends.
If you enjoy easy make-ahead breakfasts, don’t miss my Vegetable Egg Muffins for busy weekdays or the Slow Cooker French Toast Casserole when you’re craving something sweet alongside this savory favorite. I hope this casserole becomes a recipe you’ll come back to again and again—it certainly has in my kitchen!
