Cheesy Hashbrown Breakfast Casserole – The Ultimate Make-Ahead Brunch Recipe

When it comes to effortless yet satisfying breakfast ideas, nothing beats a Hashbrown Breakfast Casserole. This hearty, cheesy, and comforting dish is a crowd favorite, perfect for holiday mornings, weekend brunches, or meal prepping for the week ahead. Packed with crispy hashbrowns, savory sausage, vibrant veggies, and melty cheddar cheese, all held together in a rich, fluffy egg mixture—it’s a complete breakfast in one easy dish.

Whether you’re hosting Christmas morning breakfast, feeding a crowd, or just craving a cozy casserole, this easy breakfast bake is about to become your go-to recipe.

Ingredients & What They Do

Each ingredient in this breakfast casserole serves a purpose in creating a balanced, delicious meal:

20 oz shredded hashbrowns, thawed
The foundation of the casserole, adding heartiness and a mild potato flavor. You can use frozen shredded hashbrowns or diced potatoes—just make sure they’re thawed for even baking.
1 lb ground pork sausage, cooked and drained
Brings savory flavor and protein. You can swap with turkey sausage, ham, or bacon for variety.
¼ cup finely diced onion
Adds a sweet and savory aroma while enhancing the depth of flavor.
½ red bell pepper & ½ green bell pepper, diced
Adds color, crunch, and freshness. Great way to sneak in vegetables.
2 cups shredded cheddar cheese, divided
The creamy, melty binder that ties the whole casserole together. Reserve some for a gooey golden topping.
8 large eggs
Acts as the binding agent, holding all the ingredients together while adding protein.
1 can (12 oz) evaporated milk (or 1⅓ cups regular milk)
Makes the egg mixture creamy without being heavy. Evaporated milk creates a custardy texture.
½ tsp Italian seasoning (optional)
Adds a subtle herbal flavor that complements the sausage and veggies.
½ tsp kosher salt & ¼ tsp black pepper
Enhances every flavor in the dish.

How to Make Hashbrown Breakfast Casserole

Step 1: Preheat the Oven

If baking immediately, preheat your oven to 350°F (175°C).
Grease a 9×13-inch baking dish or spray with nonstick cooking spray.

Step 2: Cook the Sausage

In a large skillet, brown the sausage over medium-high heat, breaking it apart with a spoon until fully cooked. Drain excess fat.

Step 3: Assemble the Casserole

In the greased dish, combine the thawed hashbrowns, cooked sausage, onions, peppers, and 1½ cups of shredded cheese.
Mix gently and spread evenly.

Step 4: Make the Egg Mixture

In a large bowl, whisk together the eggs, evaporated milk, salt, pepper, and Italian seasoning until smooth and fully combined.

Step 5: Combine & Top

Pour the egg mixture evenly over the hashbrown mixture.
Sprinkle the remaining ½ cup of cheese over the top for a deliciously golden finish.

Step 6: Bake or Refrigerate

To bake now: Place the casserole in the oven and bake uncovered for 55–65 minutes or until the center is set.
To bake later: Cover the dish with foil and refrigerate overnight (up to 48 hours). Bring to room temperature for 30 minutes before baking.

Pro Tips for the Perfect Breakfast Casserole

Thaw hashbrowns completely before using to prevent excess moisture.
Customize with your favorite veggies like mushrooms, spinach, or zucchini (cook first to reduce moisture).
Swap out cheddar with pepper jack, Swiss, or Monterey Jack for different flavor profiles.
Add a dash of hot sauce or a sprinkle of chili flakes for a bit of heat.
Let it rest for 10 minutes after baking before slicing—this helps the casserole firm up.

Serving Suggestions

Serve this hashbrown breakfast casserole with:

A side of fresh fruit or a fruit salad
Buttermilk biscuits or toast
A warm mug of coffee or a mimosa for a brunch vibe

How to Store & Reheat

Refrigerate leftovers in an airtight container for up to 4 days.
Reheat in the microwave or oven until warmed through.
Freeze individual portions for up to 2 months. Thaw in the fridge overnight before reheating.

Why Everyone Loves This Recipe

This hashbrown egg casserole checks all the boxes:

Easy to make ahead
Crowd-pleasing flavor
Customizable with what you have on hand
Budget-friendly ingredients
Great for breakfast, brunch, or even dinner!

Conclusion: Your New Favorite Breakfast Tradition

Whether you’re hosting brunch, meal prepping for the week, or feeding a hungry crowd, this Hashbrown Breakfast Casserole is a guaranteed win. It’s cozy, cheesy, satisfying—and endlessly customizable. With just a little prep, you’ll have a hot and hearty breakfast that brings everyone to the table.

Pin it, print it, and make it again and again—this casserole is a keeper.