A warm, hearty breakfast casserole is one of the best ways to start the day, especially when you’re feeding family or hosting guests. This Sausage Breakfast Casserole combines crispy hash browns, savory breakfast sausage, colorful peppers, fluffy eggs, and plenty of melted cheese into one comforting dish that’s easy to prepare and perfect for weekends, holidays, or brunch gatherings.
One of the best things about this recipe is that it can be assembled ahead of time, making busy mornings much less stressful. After a quick bake, you’ll have a golden, cheesy casserole that’s filling, flavorful, and ready to serve with fresh fruit, toast, or your favorite breakfast sides.
1. Sausage Breakfast Casserole Recipe (Yield: 10 Servings)
Ingredients
- ½ cup butter (1 stick)
- 1 (30-ounce) package shredded hash brown potatoes
- Salt and black pepper, to taste
- 1 pound bulk breakfast sausage
- ½ green bell pepper, chopped
- ½ red bell pepper, chopped
- ½ small onion, diced
- 1½ cups shredded Monterey Jack cheese, packed
- 1½ cups shredded sharp Cheddar cheese, packed
- 8 large eggs
- 1⅓ cups half-and-half, heavy cream, evaporated milk, or whole milk
- 1 teaspoon seasoned salt
- ½ teaspoon kosher salt (or ¼ teaspoon table salt)
- ½ teaspoon black pepper
- ¼ teaspoon dry mustard (optional)
Equipment
- 9×13-inch baking dish
Instructions
Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with cooking spray or butter to prevent sticking.
Melt the butter and pour it evenly into the bottom of the prepared baking dish.
Spread the shredded hash brown potatoes evenly over the melted butter. If using frozen hash browns, thaw them first and gently squeeze out any excess moisture with paper towels. Season lightly with salt and black pepper.
Bake the hash brown layer for about 20 minutes until it begins to set and lightly brown around the edges. This step helps create a firmer base for the casserole.
Meanwhile, cook the breakfast sausage in a large skillet over medium heat. Break it into small crumbles as it cooks until it is fully browned with no pink remaining.
Add the chopped green pepper, red pepper, and diced onion to the skillet with the sausage. Continue cooking for 4 to 5 minutes until the vegetables soften slightly while still maintaining a little texture.
Drain any excess grease from the sausage mixture and allow it to cool for several minutes.
Evenly spread the cooked sausage and vegetable mixture over the partially baked hash brown layer.
Sprinkle the shredded Monterey Jack cheese evenly over the sausage, followed by the shredded sharp Cheddar cheese.
In a large mixing bowl, whisk together the eggs, half-and-half, seasoned salt, kosher salt, black pepper, and dry mustard until completely blended and slightly frothy.
Slowly pour the egg mixture evenly over the entire casserole, allowing it to settle naturally between the layers.
Place the casserole into the oven and bake uncovered for 35 to 45 minutes. The casserole is done when the center is fully set, the cheese is melted and lightly golden, and a knife inserted into the middle comes out clean.
If the cheese begins browning too quickly before the eggs finish cooking, loosely cover the casserole with aluminum foil during the final portion of baking.
Remove the casserole from the oven and allow it to rest for 10 minutes before slicing. This resting time helps the eggs firm up and makes serving much easier.
Slice into ten portions and serve warm with salsa, hot sauce, sour cream, fresh fruit, toast, biscuits, or avocado slices.
2. Tips for Perfect Sausage Breakfast Casserole
Thaw frozen hash browns completely before using them. Removing excess moisture prevents the casserole from becoming watery.
Bake the hash browns briefly before adding the remaining ingredients. This creates a firmer bottom layer with better texture.
Cook the sausage until well browned to develop richer flavor before adding it to the casserole.
Drain excess grease thoroughly after cooking the sausage. This keeps the casserole rich without becoming oily.
Freshly shred the cheese from a block whenever possible. Fresh cheese melts more smoothly and produces a creamier texture than pre-shredded varieties.
Whisk the eggs thoroughly until fully combined with the dairy. A well-mixed custard creates an even, fluffy texture throughout the casserole.
Allow the casserole to rest before cutting. This simple step helps the slices hold together beautifully.
For extra flavor, garnish with chopped green onions, fresh parsley, diced tomatoes, or sliced avocado just before serving.
3. Frequently Asked Questions
Can I assemble this casserole the night before?
Yes. Assemble the entire casserole, cover it tightly, and refrigerate overnight. Let it sit at room temperature for about 20 minutes before baking the next morning.
Can I use different breakfast meats?
Absolutely. Bacon, diced ham, turkey sausage, chorizo, or cooked Italian sausage all work well as substitutes for breakfast sausage.
Can I freeze this casserole?
Yes. Bake the casserole completely, cool it thoroughly, and freeze individual portions or the entire casserole for up to three months. Thaw overnight before reheating.
What side dishes pair well with breakfast casserole?
Fresh fruit, biscuits, cinnamon rolls, yogurt, fresh berries, breakfast pastries, or a simple green salad all complement this hearty dish.
How do I know when the casserole is fully cooked?
The center should be firm, the cheese should be melted and lightly golden, and a knife inserted into the middle should come out clean without any runny egg mixture.
4. Nutrition Information
| Nutrient | Amount Per Serving |
|---|---|
| Calories | 445 |
| Protein | 20 g |
| Total Fat | 33 g |
| Saturated Fat | 15 g |
| Carbohydrates | 18 g |
| Fiber | 2 g |
| Sugar | 2 g |
| Sodium | 690 mg |
| Cholesterol | 190 mg |
| Calcium | 300 mg |
This Sausage Breakfast Casserole is an easy, satisfying meal that’s perfect for feeding a crowd or preparing ahead for busy mornings. Layers of crispy hash browns, savory sausage, colorful vegetables, fluffy eggs, and melted cheese create a comforting breakfast that’s sure to become a family favorite.
With simple ingredients and straightforward preparation, this casserole is versatile enough for weekend brunches, holiday breakfasts, meal prep, or everyday family meals. Once you’ve tried it, you’ll appreciate how easy it is to customize with your favorite cheeses, vegetables, and breakfast meats while enjoying delicious results every time.
