This Breakfast Casserole with Sausage and Hash Browns is a comforting and hearty way to start your day. It’s packed with crispy hash brown potatoes, flavorful sausage, and a cheesy, eggy mixture that comes together in one easy dish. The combination of textures—from the crunchy edges to the soft, gooey center—is just right for a satisfying breakfast or brunch.
I love making this casserole when I’m feeding a crowd or want to prep breakfast ahead of time. It’s one of those recipes where you can throw everything into a baking dish and let the oven do the work. The sausage adds a nice savory kick, and the hash browns make it feel extra filling. I usually sprinkle a little extra cheese on top toward the end of baking, because who doesn’t love a cheesy finish?
What makes this dish even better is how flexible it is. I sometimes add veggies like bell peppers or onions for a bit more color and flavor, but even on its own, it shines on the breakfast table. I like to serve it with a simple side of fresh fruit or some hot coffee to round out the meal. It’s a reliable breakfast winner that always gets everyone talking about what’s for breakfast the next day!
Key Ingredients & Substitutions
Hash Browns: I like using frozen shredded hash browns because they save time and crisp nicely in the oven. If you want a fresh option, you can grate raw potatoes, just be sure to squeeze out excess moisture.
Sausage: Breakfast sausage adds great flavor and richness. Pork sausage is classic, but turkey sausage works well for a leaner option. You can even try vegetarian sausage if you prefer.
Cheddar Cheese: Sharp cheddar gives a nice bold taste, but mild cheddar or a cheese blend like Monterey Jack and mozzarella can work, too. Feel free to sprinkle a little extra on top for a golden crust.
Eggs and Milk: These create the creamy, custard-like texture that binds the casserole. Whole milk keeps it rich, but you can swap with half-and-half or a dairy-free milk if needed.
How Do You Make Sure the Casserole Bakes Evenly Without Being Watery?
A common challenge is avoiding a soggy casserole or one that’s undercooked in the middle. Here are some tips to get it just right:
- Thaw and drain the hash browns well to reduce extra water in the dish.
- Cook the sausage fully and drain excess fat before layering to keep the casserole from getting greasy.
- Whisk the eggs and milk thoroughly to make sure the mixture is smooth; this helps it cook evenly.
- Use a glass or ceramic baking dish if you have one—these heat gently and cook the casserole more evenly than metal pans.
- Bake uncovered so moisture can escape, allowing the top to brown and the casserole to set perfectly.
Equipment You’ll Need
- 9×13-inch baking dish – perfect size for even cooking and easy serving.
- Large skillet – great for browning the sausage and cooking onions.
- Mixing bowl – to whisk together eggs, milk, and seasonings smoothly.
- Whisk – helps mix the egg mixture without lumps.
- Spatula or wooden spoon – for stirring and spreading ingredients evenly.
Flavor Variations & Add-Ins
- Swap sausage for cooked bacon or diced ham to change up the protein flavor.
- Add sautéed bell peppers or mushrooms for extra color and nutrients.
- Use pepper jack cheese instead of cheddar for a little spicy kick.
- Stir in some chopped spinach or kale to boost the greens without overpowering the dish.
How to Make Breakfast Casserole with Sausage and Hash Browns
Ingredients You’ll Need:
Main Ingredients:
- 1 (30 oz) package frozen shredded hash brown potatoes, thawed
- 1 pound breakfast sausage (pork or turkey)
- 1 small onion, finely chopped (optional)
- 2 cups shredded cheddar cheese
- 8 large eggs
- 1 cup milk
- ½ teaspoon salt
- ¼ teaspoon black pepper
- ¼ teaspoon garlic powder (optional)
- 2 tablespoons fresh parsley, chopped (for garnish)
Time Needed
This casserole takes about 15 minutes to prepare and roughly 40-45 minutes to bake. Allow a few extra minutes to cool before serving. Overall, you’ll need about 1 hour from start to finish.
Step-by-Step Instructions:
1. Prepare Your Oven and Sausage:
Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish to prevent sticking. Then, in a large skillet over medium heat, cook the sausage. Break it into small pieces as it cooks. If using onions, add them now and cook until the sausage is browned and the onions are soft (about 5-7 minutes). Drain any excess grease.
2. Layer the Hash Browns and Sausage:
Spread the thawed hash browns evenly in the bottom of your prepared baking dish. Sprinkle half of the cooked sausage over the hash browns. Next, evenly sprinkle 1 cup of shredded cheddar cheese over the sausage.
3. Mix and Pour the Egg Mixture:
In a large bowl, whisk together the eggs, milk, salt, pepper, and garlic powder until smooth and combined. Pour this egg mixture evenly over the layers in the baking dish.
4. Add Remaining Toppings and Bake:
Sprinkle the remaining cooked sausage evenly across the top. Then top with the remaining 1 cup of cheddar cheese. Bake the casserole uncovered for about 40 to 45 minutes, or until the eggs are fully set, the cheese is melted, and the top is golden brown.
5. Finish and Serve:
Once baked, remove the casserole from the oven and let it cool for a few minutes. Garnish with fresh chopped parsley and serve warm. Enjoy your hearty, cheesy breakfast casserole!
Can I Use Fresh Potatoes Instead of Frozen Hash Browns?
Yes! If using fresh potatoes, grate them and squeeze out as much moisture as possible before layering. This will help prevent the casserole from becoming watery.
Can I Prepare This Casserole the Night Before?
Absolutely! Assemble the casserole, cover it tightly, and refrigerate overnight. In the morning, bake it a little longer—about 50-55 minutes—to ensure it’s fully cooked through.
How Should I Store Leftovers?
Store any leftover casserole in an airtight container in the fridge for up to 3 days. Reheat gently in the oven or microwave until warmed through.
Can I Substitute the Sausage with Other Proteins?
Yes! You can swap sausage for cooked bacon, ham, or even a vegetarian sausage alternative to suit your taste or dietary needs.
