This sausage hashbrown breakfast casserole is a hearty and delicious way to start your day. Combining the savory flavors of breakfast sausage, hashbrowns, and cheddar cheese, this dish is perfect for feeding a crowd or meal prepping for the week. It's easy to make and sure to be a hit with everyone at the table.
Most of the ingredients in this recipe are common pantry staples, but you may need to pick up a few items at the supermarket. Make sure to get a package of frozen hashbrowns and some breakfast sausage. If you don't already have cheddar cheese, eggs, and milk on hand, you'll need those as well.

Ingredients For Sausage Hashbrown Breakfast Casserole
Breakfast sausage: Adds a savory and slightly spicy flavor to the casserole.
Hashbrowns: Provides a crispy and hearty base for the dish.
Cheddar cheese: Melts beautifully and adds a rich, creamy texture.
Eggs: Bind the ingredients together and add protein.
Milk: Helps to create a smooth and creamy consistency.
Salt: Enhances the overall flavor of the dish.
Black pepper: Adds a touch of heat and depth to the flavor profile.
Technique Tip for This Recipe
When preparing the hashbrowns, make sure they are thoroughly thawed and patted dry with a paper towel to remove excess moisture. This will help achieve a crispier texture in the final casserole. Additionally, when whisking the eggs and milk, ensure they are well combined to create a uniform mixture that will evenly coat the sausage and hashbrowns.
Suggested Side Dishes
Alternative Ingredients
cooked and crumbled breakfast sausage - Substitute with cooked and crumbled turkey sausage: Turkey sausage is a leaner option and provides a similar texture and flavor.
cooked and crumbled breakfast sausage - Substitute with cooked and crumbled vegetarian sausage: Vegetarian sausage offers a plant-based alternative while maintaining the savory taste.
thawed frozen hashbrowns - Substitute with freshly grated potatoes: Freshly grated potatoes can be used to achieve a similar texture and flavor, though they may require additional cooking time.
thawed frozen hashbrowns - Substitute with sweet potato hashbrowns: Sweet potato hashbrowns add a different flavor profile and additional nutrients.
shredded cheddar cheese - Substitute with shredded mozzarella cheese: Mozzarella cheese provides a milder flavor and a gooey texture.
shredded cheddar cheese - Substitute with shredded pepper jack cheese: Pepper jack cheese adds a spicy kick to the casserole.
beaten eggs - Substitute with egg substitute: Egg substitutes are ideal for those with dietary restrictions or allergies.
beaten eggs - Substitute with silken tofu: Silken tofu can be blended to mimic the texture of beaten eggs, suitable for a vegan option.
milk - Substitute with almond milk: Almond milk is a dairy-free alternative that works well in casseroles.
milk - Substitute with oat milk: Oat milk provides a creamy texture and is a good dairy-free option.
salt - Substitute with soy sauce: Soy sauce can add a salty and umami flavor, though it will change the overall taste slightly.
salt - Substitute with sea salt: Sea salt can be used as a direct replacement, offering a slightly different mineral content.
black pepper - Substitute with white pepper: White pepper provides a similar heat but with a different flavor profile.
black pepper - Substitute with cayenne pepper: Cayenne pepper adds a spicier kick to the dish.
Other Alternative Recipes Similar to This Breakfast Casserole
How to Store / Freeze This Breakfast Casserole
Allow the sausage hashbrown breakfast casserole to cool completely before storing. This helps prevent condensation, which can make the dish soggy.
For short-term storage, transfer the casserole to an airtight container. Refrigerate for up to 3-4 days. Reheat individual portions in the microwave or the entire dish in the oven at 350°F (175°C) until warmed through.
To freeze, cut the cooled casserole into individual portions. Wrap each portion tightly in plastic wrap, then in aluminum foil to prevent freezer burn. Place the wrapped portions in a freezer-safe bag or container. Label with the date for easy tracking.
When ready to enjoy, thaw the desired number of portions in the refrigerator overnight. Reheat in the oven at 350°F (175°C) until hot and bubbly, or microwave on a microwave-safe plate until heated through.
For a quicker reheating option, you can reheat directly from frozen. Place the frozen portion in a baking dish, cover with foil, and bake at 350°F (175°C) for about 20-30 minutes, or until heated through. Remove the foil for the last 5-10 minutes to allow the top to crisp up.
If you prefer a crispier texture, reheat the hashbrowns and sausage mixture in a skillet over medium heat, stirring occasionally, until warmed through and slightly crispy.
Avoid reheating the casserole multiple times, as this can affect the texture and flavor. Only reheat the amount you plan to consume immediately.
For added freshness, consider adding a sprinkle of freshly grated cheddar cheese or a dollop of sour cream before serving reheated portions.
How to Reheat Leftovers
Oven Method:
- Preheat your oven to 350°F (175°C).
- Place the leftover sausage hashbrown breakfast casserole in an oven-safe dish.
- Cover the dish with aluminum foil to prevent the top from drying out.
- Heat for about 20-25 minutes, or until the casserole is heated through and the cheese is melted and bubbly.
- Remove the foil for the last 5 minutes to let the top crisp up slightly.
Microwave Method:
- Place a portion of the casserole on a microwave-safe plate.
- Cover with a microwave-safe lid or a damp paper towel to retain moisture.
- Heat on medium power for 2-3 minutes, checking halfway through to ensure even heating.
- If not heated through, continue in 30-second increments until hot.
Stovetop Method:
- Heat a non-stick skillet over medium heat.
- Add a small amount of olive oil or butter to the skillet.
- Place a portion of the casserole in the skillet and cover with a lid.
- Heat for about 5-7 minutes, flipping halfway through to ensure even heating.
- The bottom should be slightly crispy and the eggs should be heated through.
Air Fryer Method:
- Preheat your air fryer to 350°F (175°C).
- Place a portion of the casserole in the air fryer basket.
- Heat for 5-7 minutes, checking halfway through to ensure it doesn’t overcook.
- The hashbrowns should become crispy and the sausage should be heated through.
Toaster Oven Method:
- Preheat your toaster oven to 350°F (175°C).
- Place the casserole on a toaster oven tray.
- Cover with aluminum foil to prevent the top from drying out.
- Heat for about 15-20 minutes, removing the foil for the last 5 minutes to crisp up the top.
Best Tools for This Recipe
Oven: Used to bake the casserole at a consistent temperature of 350°F (175°C).
Large mixing bowl: Used to combine the cooked sausage, hashbrowns, and cheese.
Medium mixing bowl: Used to whisk together the eggs, milk, salt, and pepper.
Whisk: Used to beat the eggs and mix them with milk, salt, and pepper.
Greased baking dish: Used to transfer the combined mixture and bake it in the oven.
Measuring cups: Used to measure the milk and cheese accurately.
Measuring spoons: Used to measure the salt and pepper accurately.
Spatula: Used to stir the egg mixture into the sausage mixture.
Knife: Used to cut the casserole into portions after baking.
Cutting board: Used as a surface to cut the casserole after it has cooled.
Cooling rack: Used to let the casserole cool for a few minutes before serving.
How to Save Time on Making This Breakfast Casserole
Prepare ingredients ahead: Cook and crumble the sausage the night before to save time in the morning.
Use pre-shredded cheese: Opt for pre-shredded cheddar cheese to cut down on prep time.
Thaw hashbrowns overnight: Place the frozen hashbrowns in the fridge the night before to ensure they are ready to use.
Mix dry ingredients: Combine the sausage, hashbrowns, and 1 cup of cheese in a bowl and store in the fridge until ready to use.
Pre-grease the baking dish: Grease the baking dish ahead of time to streamline the assembly process.

Sausage Hashbrown Breakfast Casserole Recipe
Ingredients
Main Ingredients
- 1 lb breakfast sausage cooked and crumbled
- 1 package frozen hashbrowns thawed
- 2 cups shredded cheddar cheese
- 8 eggs beaten
- 1 cup milk
- 1 teaspoon salt
- ½ teaspoon black pepper
Instructions
- Preheat oven to 350°F (175°C).
- In a large mixing bowl, combine cooked sausage, hashbrowns, and 1 cup of cheese.
- In another bowl, whisk together eggs, milk, salt, and pepper.
- Pour egg mixture over the sausage mixture and stir to combine.
- Transfer to a greased baking dish and top with remaining cheese.
- Bake for 45 minutes or until the top is golden and the casserole is set.
- Let it cool for a few minutes before serving.
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