Why You’ll Love This Recipe

Breakfast Casserole is simple to prepare and can be assembled the night before, making busy mornings stress-free. It combines protein, potatoes, and cheese into one delicious dish that’s perfect for feeding a crowd. Whether you’re hosting brunch or planning weekly breakfasts, this casserole is a reliable favorite that reheats beautifully.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Frozen shredded hash browns, thawed
Eggs
Breakfast sausage, cooked and crumbled
Shredded cheddar cheese
Shredded mozzarella cheese
Whole milk
Heavy cream
Yellow onion, diced
Bell pepper, diced
Garlic, minced
Butter
Garlic powder
Onion powder
Salt
Black pepper
Paprika
Chopped green onions (optional)
Fresh parsley, chopped (optional)

Directions

Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking dish.
Heat the butter in a skillet over medium heat.
Sauté the diced onion and bell pepper for 4–5 minutes until softened.
Add the garlic and cook for about 30 seconds until fragrant.
Spread the thawed hash browns evenly into the prepared baking dish.
Sprinkle the cooked breakfast sausage over the hash browns.
Add the sautéed vegetables evenly across the casserole.
Sprinkle half of the cheddar and mozzarella cheeses over the top.
In a large bowl, whisk together the eggs, milk, heavy cream, garlic powder, onion powder, paprika, salt, and black pepper.
Pour the egg mixture evenly over the casserole.
Sprinkle the remaining cheese over the top.
Bake for 45–50 minutes, or until the eggs are fully set and the top is lightly golden.
Allow the casserole to rest for 10 minutes before slicing.
Garnish with chopped green onions and fresh parsley if desired.

Servings and timing

Servings: 8
Prep time: 20 minutes
Cook time: 50 minutes
Rest time: 10 minutes
Total time: 1 hour 20 minutes

Variations

Replace the sausage with cooked bacon, diced ham, or chorizo.
Add spinach, mushrooms, broccoli, or tomatoes for extra vegetables.
Use Pepper Jack cheese for a spicy version.
Substitute tater tots for the hash browns for a fun twist.
Make it vegetarian by omitting the meat and adding extra vegetables.
Add diced jalapeños or green chilies for extra heat.
Swap cheddar for Swiss, Monterey Jack, Gruyère, or Colby Jack cheese.
Use turkey sausage for a lighter option.

Storage/Reheating

Store leftover Breakfast Casserole in an airtight container in the refrigerator for up to 4 days. Reheat individual slices in the microwave for 1–2 minutes or warm larger portions in a 350°F (175°C) oven until heated through. Freeze cooled portions in airtight containers or freezer bags for up to 3 months. Thaw overnight in the refrigerator before reheating.

FAQs

Can I make Breakfast Casserole the night before?

Yes. Assemble the casserole, cover it tightly, and refrigerate overnight. Bake it the next morning as directed.

Can I use fresh potatoes instead of frozen hash browns?

Yes. Shred fresh potatoes, squeeze out as much moisture as possible, and use them in place of frozen hash browns.

What meat works best?

Breakfast sausage is the most popular choice, but bacon, ham, turkey sausage, or chorizo are all delicious options.

Can I freeze Breakfast Casserole?

Yes. Bake, cool completely, and freeze for up to 3 months.

How do I know when the casserole is done?

The center should be fully set, and a knife inserted into the middle should come out clean.

Can I make it without meat?

Absolutely. Add extra vegetables such as spinach, mushrooms, peppers, or broccoli for a satisfying vegetarian version.

What cheese is best?

Cheddar is classic, but Monterey Jack, Swiss, Gruyère, mozzarella, Pepper Jack, or Colby Jack all work well.

Why is my casserole watery?

Excess moisture usually comes from vegetables or potatoes. Drain cooked vegetables well and thaw frozen hash browns before using.

What can I serve with Breakfast Casserole?

Fresh fruit, toast, biscuits, muffins, yogurt, pancakes, waffles, or a simple green salad all make excellent accompaniments.

Can I use egg whites instead of whole eggs?

Yes. You can substitute egg whites or a combination of whole eggs and egg whites for a lighter version.

Conclusion

Breakfast Casserole is the ultimate make-ahead breakfast that combines fluffy eggs, savory sausage, crispy hash browns, and plenty of melted cheese into one comforting dish. Perfect for holidays, brunches, meal prep, or everyday family breakfasts, this versatile recipe is easy to customize and guaranteed to satisfy everyone at the table. Once you try it, it’ll quickly become one of your favorite breakfast traditions.

Breakfast Casserole

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Breakfast Casserole is a hearty, make-ahead breakfast packed with fluffy eggs, savory sausage, crispy hash browns, sautéed vegetables, and plenty of melted cheese. It’s a comforting, family-friendly dish that’s perfect for brunch, holidays, or meal prep.

Author: Laura
Prep Time: 20 minutes
Cook Time: 50 minutes
Total Time: 1 hour 20 minutes
Yield: 8 servings
Category: Breakfast
Method: Bake
Cuisine: American
Diet: Halal

Instructions

Preheat the oven to 350°F (175°C) and grease a 9×13-inch baking dish.
Heat the butter in a skillet over medium heat. Sauté the diced onion and bell pepper for 4–5 minutes until softened, then add the garlic and cook for 30 seconds.
Spread the thawed hash browns evenly in the prepared baking dish.
Sprinkle the cooked breakfast sausage over the hash browns.
Distribute the sautéed vegetables evenly over the sausage.
Sprinkle half of the cheddar and mozzarella cheeses over the casserole.
In a large bowl, whisk together the eggs, milk, heavy cream, garlic powder, onion powder, paprika, salt, and black pepper.
Pour the egg mixture evenly over the casserole.
Top with the remaining cheddar and mozzarella cheeses.
Bake for 45–50 minutes, or until the eggs are fully set and the top is lightly golden.
Let the casserole rest for 10 minutes before slicing and serving.
Garnish with chopped green onions and fresh parsley if desired.

Notes

Assemble the casserole the night before, refrigerate, and bake the next morning.
Substitute bacon, diced ham, turkey sausage, or chorizo for the breakfast sausage.
Add spinach, mushrooms, broccoli, tomatoes, or jalapeños for extra flavor and nutrition.
Store leftovers in the refrigerator for up to 4 days or freeze for up to 3 months.
Thaw frozen hash browns and drain excess moisture from vegetables to prevent a watery casserole.

Nutrition

Serving Size: 1 serving
Calories: 470 kcal
Sugar: 3 g
Sodium: 760 mg
Fat: 34 g
Saturated Fat: 15 g
Unsaturated Fat: 16 g
Trans Fat: 0.5 g
Carbohydrates: 18 g
Fiber: 2 g
Protein: 24 g
Cholesterol: 285 mg