Sausage Breakfast Casserole

A Hearty and Delicious Way to Start Your Day

There’s nothing better than waking up to the smell of a warm, cheesy, and flavorful breakfast casserole. This sausage breakfast casserole is a family favorite because it’s easy to make, packed with protein, and incredibly satisfying. Whether you’re preparing breakfast for a busy weekday, a lazy weekend, or a holiday brunch, this dish is a perfect choice.

One of the best things about this casserole is that you can make it ahead of time. Imagine prepping it the night before, letting all the flavors blend, and simply baking it in the morning. It saves time and makes breakfast stress-free. Plus, it’s a great way to feed a crowd without standing over the stove flipping pancakes or frying eggs.

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I love this recipe because it’s comforting and versatile. You can keep it classic with sausage, eggs, cheese, and bread, or customize it with your favorite ingredients. Add veggies for a healthier twist, use different cheeses for extra flavor, or swap sausage for bacon if that’s what you prefer. No matter how you make it, this casserole is always a hit!

If you’re looking for a kid-friendly, budget-friendly, and filling breakfast idea, this sausage casserole checks all the boxes. It’s warm, cheesy, and full of delicious flavors that even picky eaters will enjoy. Plus, it’s perfect for special occasions like Christmas morning, Easter brunch, or a casual weekend gathering with friends.

About Sausage Breakfast Casserole

Sausage breakfast casserole is a hearty, baked dish made with eggs, sausage, cheese, and bread or potatoes. It’s a one-pan meal that combines all your favorite breakfast flavors into a warm and satisfying bite. This casserole is a popular choice for weekend brunches, holiday mornings, and even meal prep because it’s easy to make, serves a crowd, and reheats well.

While breakfast casseroles are a staple in many households, this particular version stands out because of the savory, flavorful sausage. Some breakfast casseroles use ham or bacon, but sausage adds a bold, slightly spicy kick that pairs perfectly with the creamy eggs and gooey cheese. You can also customize this dish with different vegetables, seasonings, or even a dash of hot sauce for extra flavor.

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Why You’ll Love It

There are so many reasons to love this sausage breakfast casserole! Here are just a few:

1. It’s Super Easy to Make

This recipe is as simple as cooking some sausage, whisking eggs, and layering everything in a baking dish. No complicated steps or fancy techniques—just mix, bake, and enjoy!

2. Perfect for Meal Prep

Make it ahead, refrigerate it overnight, and just pop it in the oven the next morning. It’s great for busy mornings when you don’t have time to cook from scratch. Plus, leftovers reheat beautifully!

3. Customizable to Your Taste

Want to add veggies? Go for it! Prefer bacon over sausage? No problem! Love extra cheese? Pile it on! This casserole is incredibly versatile, so you can make it just the way you like.

4. Feeds a Crowd

Whether you’re serving family, friends, or holiday guests, this dish is a fantastic way to feed a lot of people without spending hours in the kitchen. It’s filling, satisfying, and always a hit!

5. The Ultimate Comfort Food

Warm, cheesy, and packed with flavor, this casserole is pure comfort on a plate. It’s the kind of breakfast that makes you want to curl up with a cup of coffee and savor every bite.

Ingredients

This sausage breakfast casserole uses simple, wholesome ingredients that come together to create a rich and satisfying dish. You probably already have most of these in your kitchen!

For the Casserole Base:

• 1 pound (450g) breakfast sausage – I love using a mild or spicy pork sausage, but you can also use turkey sausage for a leaner option.
• 6 large eggs – The base of the casserole, making it rich and custardy.
• 1 ½ cups (360ml) milk – Whole milk gives the best creamy texture, but you can also use half-and-half for extra richness.
• 1 teaspoon salt
• ½ teaspoon black pepper
• ½ teaspoon garlic powder
• ½ teaspoon onion powder

For the Bread Layer:

• 4 cups (about 6 slices) of bread, cubed – Day-old bread works best because it absorbs the egg mixture without getting too mushy. Brioche or French bread adds a slight sweetness!
• 1 ½ cups shredded cheddar cheese – Sharp cheddar melts beautifully and gives a rich, cheesy bite. Feel free to mix in Monterey Jack or pepper jack for more flavor.

Optional Add-Ins:

• ½ cup bell peppers, diced
• ½ cup mushrooms, sliced – A great way to sneak in some veggies.
• ¼ teaspoon smoked paprika
• ½ teaspoon dried oregano or Italian seasoning

Topping (Optional but Delicious!):

• ½ cup shredded mozzarella cheese – For an extra cheesy top.
• Chopped green onions or parsley

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Kitchen Tools Needed

Having the right tools makes this recipe even easier! Here’s what I recommend:

1. Large Skillet

• Used for browning the sausage. A cast iron skillet works great for even cooking.

2. Mixing Bowls

• You’ll need a medium-sized bowl to whisk the eggs, milk, and seasonings together.

3. 9×13-Inch Baking Dish

• The perfect size for baking the casserole. If you want a thicker casserole, you can use a smaller, deeper dish, but you may need to adjust the cooking time.

4. Whisk

• Helps blend the eggs and milk smoothly. If you don’t have one, a fork works too!

5. Knife & Cutting Board

• For dicing the bread and optional veggies.

6. Measuring Cups & Spoons

• Precision is key, especially for the egg-to-milk ratio.

Personal Recommendation:

If you love crispy edges on your casseroles, use a ceramic or glass baking dish instead of metal—it distributes heat more evenly and prevents over-browning. I also swear by pre-shredded cheese, but for the best melt, shred your own from a block!

Instructions

This sausage breakfast casserole is super easy to make, and the best part? You can prep it the night before for a stress-free morning! Follow these step-by-step instructions for a perfect, golden, cheesy casserole.

Step 1: Preheat the Oven

• Set your oven to 350°F (175°C) and grease a 9×13-inch baking dish with butter or non-stick spray. This prevents sticking and makes cleanup easier.

Step 2: Cook the Sausage (About 7-10 minutes)

• Heat a large skillet over medium heat and add the breakfast sausage.
• Break it apart with a spoon or spatula and cook until it’s browned and fully cooked (about 7-10 minutes).
• Pro Tip: If the sausage releases a lot of grease, drain it on a paper towel to avoid a greasy casserole.

Step 3: Prep the Bread and Cheese (5 minutes)

• While the sausage is cooking, cube the bread into bite-sized pieces and place them evenly in the greased baking dish.
• Sprinkle 1 cup of shredded cheddar cheese over the bread.
• Pro Tip: Using day-old bread helps it absorb the egg mixture better and prevents sogginess.

Step 4: Make the Egg Mixture (5 minutes)

• In a medium mixing bowl, whisk together:
  • 6 eggs
  • 1 ½ cups milk
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • ½ teaspoon garlic powder
  • ½ teaspoon onion powder
• Whisk continuously until the mixture is smooth.
• Pro Tip: Want an extra creamy texture? Use half-and-half instead of milk!

Step 5: Assemble the Casserole (5 minutes)

• Evenly spread the cooked sausage over the bread and cheese layer.
• If you’re adding veggies (bell peppers, mushrooms, etc.), sprinkle them on top.
• Pour the egg mixture evenly over the entire casserole, making sure everything is coated.
• Sprinkle the remaining ½ cup of cheddar cheese on top.

Step 6: Let It Sit (Optional, But Recommended!)

• If you have time, let the casserole sit for 10-15 minutes before baking. This helps the bread soak up the eggs for a richer texture.
• Overnight Prep: Cover with plastic wrap and refrigerate overnight. The next morning, just bake and enjoy!

Step 7: Bake to Perfection (40-45 minutes)

• Place the casserole in the preheated oven and bake for 40-45 minutes, or until the center is set and the top is golden brown.
• Pro Tip: To check if it’s done, insert a knife in the middle—if it comes out clean, it’s ready!

Step 8: Rest and Serve (5-10 minutes)

• Remove the casserole from the oven and let it rest for 5-10 minutes before slicing. This helps it set, making it easier to cut.
• Sprinkle with chopped green onions or fresh parsley for a pop of color and freshness.

Step 9: Enjoy!

• Serve warm with hot sauce, salsa, or a side of fresh fruit for a complete breakfast.
• Leftovers? Store them in an airtight container in the fridge for up to 4 days or freeze for later!

Tips and Tricks for Success

Want to make the best-ever sausage breakfast casserole? Here are my top tips to ensure it turns out flavorful, cheesy, and perfectly baked every time!

1. Use Day-Old Bread for the Best Texture

Fresh bread can get too soggy, but day-old or slightly stale bread soaks up the egg mixture beautifully and creates a firmer, fluffier texture. If you only have fresh bread, try toasting the cubes in the oven for 5-10 minutes at 300°F (150°C) to dry them out.

2. Cook the Sausage Until Golden Brown

Don’t rush this step! Letting the sausage get a little crispy adds extra flavor to the casserole. If you love bold flavors, try using spicy breakfast sausage or even chorizo for a smoky kick.

3. Don’t Skip the Cheese on Top!

Mixing cheese into the casserole is great, but adding a little extra on top creates that golden, bubbly, cheesy crust that everyone loves. If you want an even richer topping, mix cheddar with mozzarella or Monterey Jack.

4. Customize with Your Favorite Add-Ins

This recipe is super flexible! Some of my favorite additions include:

• Diced bell peppers for a pop of sweetness.
• Spinach or mushrooms for extra nutrients.
• Crumbled bacon for a smoky twist.
• A dash of hot sauce or red pepper flakes if you like a little heat.

5. Make It the Night Before for a Stress-Free Morning

If you’re making this for a holiday breakfast or brunch, prepping it the night before is a game-changer! Just assemble everything, cover it, and refrigerate overnight. In the morning, bake it straight from the fridge (just add 5 extra minutes to the cooking time).

6. Let It Rest Before Cutting

It’s tempting to dive in right away, but letting the casserole rest for 5-10 minutes helps it firm up, making it easier to slice and serve. Trust me—it’s worth the wait!

Ingredient Substitutions and Variations

One of the best things about this sausage breakfast casserole is how easy it is to customize! Whether you’re looking for healthier swaps, dietary adjustments, or just a fun twist, here are some great ingredient substitutions and variations.

Substitutions

1. Dairy-Free Options

• Instead of milk, use unsweetened almond milk, oat milk, or coconut milk. (Almond milk works best for a neutral taste.)
• Instead of cheese, try dairy-free shredded cheese or nutritional yeast for a cheesy flavor.

2. Gluten-Free Swap

• Use gluten-free bread or swap the bread for hash browns or diced potatoes for a naturally gluten-free version.
• If you love a bit of crunch, sprinkle crushed gluten-free crackers or crushed cornflakes on top before baking.

3. Meat Alternatives

• Replace the sausage with turkey sausage, chicken sausage, or plant-based sausage for a leaner or vegetarian-friendly option.
• Want extra protein? Add cooked shredded chicken or even crumbled tofu seasoned with garlic and paprika for a meat-free version.

4. Egg-Free Version

• Replace eggs with a mixture of 1 cup mashed silken tofu + ¼ cup nutritional yeast + ½ teaspoon turmeric for a plant-based alternative.

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Variations

1. Spicy Version

Love a little heat? Try these additions:

• ¼ teaspoon red pepper flakes or ½ teaspoon smoked paprika.
• Swap regular sausage for spicy Italian sausage or chorizo.
• Drizzle with hot sauce before serving.

2. Loaded Veggie Casserole

Want a nutrient boost? Add:

• ½ cup diced bell peppers (red, yellow, or green).
• ½ cup spinach or kale, chopped.
• ½ cup mushrooms, sliced.

3. Protein-Packed Version

Need extra protein? Try:

• Adding diced grilled chicken for extra heartiness.
• Mixing in cooked quinoa or black beans for plant-based protein.
• Topping with a fried egg before serving.

4. Sweet and Savory Twist

If you love the combo of sweet and savory, try this:

• Use maple-flavored sausage or drizzle maple syrup over the baked casserole.
• Swap cheddar cheese for Gouda or Swiss for a slightly nutty taste.
• Serve with a side of fresh fruit like berries or apple slices.

5. Mini Breakfast Casseroles

Want an on-the-go option?

• Instead of baking in a large dish, divide the mixture into muffin tins and bake for 20-25 minutes.

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Serving Suggestions

This sausage breakfast casserole is delicious on its own, but pairing it with the right sides and drinks makes it an unforgettable meal!

1. Fresh Fruit Salad

The richness of the casserole pairs perfectly with a light, refreshing fruit salad. Try a mix of:

• Strawberries, blueberries, and grapes
• Sliced oranges or grapefruit
• A drizzle of honey or a squeeze of fresh lime juice

2. Crispy Hash Browns or Roasted Potatoes

If you’re a fan of big breakfasts, serve this casserole with a side of crispy hash browns or roasted potatoes for extra crunch and heartiness.

3. Buttery Biscuits or Toast

A warm biscuit or a slice of buttered toast is the perfect way to scoop up every cheesy, eggy bite of this casserole. Try serving it with:

• Homemade buttermilk biscuits
• Crispy sourdough toast

4. Beverages: Coffee, Tea, or Fresh Juice

No breakfast is complete without a good drink! Some favorites include:

• Hot coffee or a caramel latte for a cozy start.
• Iced vanilla chai tea if you want something smooth and slightly spicy.
• Freshly squeezed orange juice or a fruit smoothie for a bright, citrusy balance.

5. Brunch Spread for Special Occasions

Hosting a holiday breakfast or weekend brunch? Serve this casserole alongside:

• Crispy bacon or turkey bacon.
• Fluffy pancakes or waffles with syrup.
• Mimosas or a brunch-style sangria for the adults!

Storage and Reheating Instructions

One of the best things about this sausage breakfast casserole is that it stores beautifully, making it perfect for meal prep or leftovers. Here’s how to keep it fresh and reheat it so it tastes just as good as the day you made it!

How to Store Leftovers

In the Refrigerator (Best for Short-Term Storage)

• Allow the casserole to cool completely before storing.
• Cut it into individual portions or keep it whole.
• Store in an airtight container or cover the baking dish tightly with plastic wrap or aluminum foil.
• It will stay fresh for up to 4 days in the fridge.

In the Freezer (Great for Meal Prep!)

• Once cooled, cut the casserole into portions for easy reheating.
• Wrap each piece in plastic wrap, then place them in a ziplock freezer bag or airtight container.
• Freeze for up to 2 months.
• Pro Tip: Label your container with the date so you know when to use it!

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How to Reheat

Whether you’re reheating from the fridge or freezer, here’s how to bring your casserole back to life!

In the Microwave (Best for Quick Reheating)

• Place a slice on a microwave-safe plate.
• Cover with a damp paper towel to prevent it from drying out.
• Heat on medium power for 30-60 seconds. If frozen, heat in 30-second intervals until warmed through.
• Personal Tip: I love adding a splash of milk or a sprinkle of cheese before reheating—it makes it extra creamy and fresh!

In the Oven (Best for Crispiness & Even Heating)

• Preheat oven to 325°F (160°C).
• Place the casserole (whole or sliced) in an oven-safe dish.
• Cover loosely with foil to prevent drying out.
• Bake for 10-15 minutes (longer if reheating from frozen).
• Pro Tip: Remove the foil for the last 5 minutes if you want the cheese to crisp up again!

On the Stovetop (Best for Small Portions)

• Heat a non-stick skillet over medium-low heat.
• Add a small amount of butter or oil.
• Place the casserole slice in the pan and cover with a lid.
• Heat for 5-7 minutes, flipping halfway through for even warming.
• Personal Tip: I sometimes top it with a fried egg while reheating for an extra delicious breakfast!

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Frequently Asked Questions

Have questions about making the perfect sausage breakfast casserole? You’re not alone! Here are some of the most common questions (and answers!) to help you get the best results.

Can I Make This Casserole the Night Before?

Yes! This casserole is perfect for overnight prep. Simply assemble everything in your baking dish, cover it tightly, and refrigerate overnight. In the morning, bake it as directed—just add 5 extra minutes to account for the cold start.

How Do I Prevent the Casserole from Being Too Soggy?

If your casserole turns out too soft or soggy, try these fixes:

• Use day-old or slightly stale bread instead of fresh bread.
• Make sure to let the casserole rest for 5-10 minutes after baking to help it set.
• Reduce the amount of milk slightly if you prefer a firmer texture.

Can I Use a Different Type of Sausage?

Absolutely! This recipe works well with any kind of sausage. Try:

• Turkey sausage for a leaner option.
• Spicy chorizo for a smoky, bold flavor.
• Plant-based sausage for a vegetarian-friendly version.

Can I Make This Without Bread?

Yes! If you want a low-carb or gluten-free version, you can swap the bread for:

• Hash browns or shredded potatoes (for a crispy texture).
• Cauliflower rice (for a lighter, veggie-packed option).

What’s the Best Cheese to Use?

I love using sharp cheddar because it melts beautifully and adds great flavor. But you can also try:

• Mozzarella for a milder, gooey texture.
• Pepper Jack for a little spice.
• Swiss or Gouda for a rich, nutty taste.

Can I Freeze This Casserole Before Baking?

Yes! You can prepare the casserole ahead of time and freeze it before baking. Just:

1. Assemble the casserole in a freezer-safe dish.
2. Cover it tightly with plastic wrap and foil.
3. Freeze for up to 2 months.
4. When ready to bake, thaw it in the fridge overnight and bake as directed.

How Do I Know When the Casserole Is Fully Cooked?

The easiest way to check is to insert a knife into the center—if it comes out clean and the eggs are set (not jiggly), it’s done! You can also use a thermometer: the internal temp should be at least 160°F (71°C).

Can I Add Vegetables Without Making It Watery?

Yes! If using veggies with high water content (like mushrooms, spinach, or zucchini), try these tips:

• Sauté them first to release extra moisture.
• Pat them dry before adding them to the casserole.
• Use roasted or grilled vegetables for extra flavor and less moisture.

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I hope you love this sausage breakfast casserole as much as I do! Whether you make it for a lazy Sunday breakfast, a holiday brunch, or meal prep for the week, it’s a guaranteed crowd-pleaser.

I’d love to hear how it turns out for you! Did you add any fun twists? Do you like your casserole extra cheesy or loaded with veggies? Drop a comment below and let me know!

Don’t forget to share your photos on Instagram and tag me (@tasiahub_) or use the hashtag (#tasiahub). I’d love to see your creations!