Best Breakfast Hashbrown Casserole

I’m convinced that hashbrowns make everything better. There’s something about those crispy, golden potatoes that turns any regular breakfast into something worth waking up for. But let’s be honest – standing over the stove flipping hashbrowns while everyone’s waiting to eat isn’t exactly relaxing.

That’s where this casserole comes in. You can throw everything together in one dish, pop it in the oven, and actually sit down with your family when it’s ready. I like to prep mine the night before so I can just slide it in the oven while I’m making coffee. Less mess, less stress, and everyone’s happy.

The best part? It’s got all the good stuff – eggs, cheese, and those crispy hashbrowns we love. Whether you’re feeding a crowd on the weekend or just want leftovers for the week, this one’s a keeper.

Substitution Options

• Pork sausage: You can easily swap pork sausage for turkey sausage, chicken sausage, or even crumbled bacon. Vegetarians can use plant-based sausage or skip the meat entirely and add sautéed mushrooms and bell peppers instead.
• Whole milk or heavy cream: If you only have one or the other, that’s fine. You can also use half-and-half or even 2% milk, though the casserole will be slightly less rich. For a dairy-free option, try unsweetened almond milk or oat milk.
• Cheddar cheese: Feel free to mix things up with Monterey Jack, pepper jack for some heat, Swiss, or a Mexican cheese blend. You can also use a combination of whatever cheese you have in the fridge.
• Frozen hash browns: Thawed frozen hash browns work best here, but if you’re in a pinch, you can grate fresh potatoes. Just squeeze out as much moisture as possible with a clean kitchen towel before adding them to prevent a watery casserole.
• Eggs: The eggs are really essential for this casserole to set properly, so I wouldn’t recommend substituting these.

Can I Make This Casserole Ahead and Bake it Later?

Yes. Assemble the casserole as written, then cover and refrigerate for up to 24 hours. When ready to bake:

1. Total time will be about 65–80 minutes (longer if starting from cold). Let rest 5 minutes before slicing.
2. Let it come to room temperature for about 15–30 minutes.
3. Preheat to 375°F.
4. Bake covered for 50–60 minutes, then uncover and bake 15–20 minutes more until the eggs are set and the top is lightly browned.

Avoid These Mistakes While Cooking

Skipping the step of thawing and draining your frozen hashbrowns is a big mistake – excess moisture will make your casserole watery instead of crispy on top, so squeeze out as much liquid as possible using a clean kitchen towel or paper towels.

Another common error is not fully cooking your sausage before adding it to the casserole, which can leave you with greasy pockets and undercooked meat, so make sure to brown it completely and drain the excess fat.

To get that golden, crispy top layer everyone loves, avoid covering the casserole with foil for the entire baking time – instead, bake it uncovered or remove the foil during the last 15-20 minutes.

Finally, let the casserole rest for about 10 minutes after pulling it from the oven, as this allows the egg mixture to set properly and makes cutting and serving much cleaner.

How to Store

Store: Leftover hashbrown casserole keeps really well in the fridge. Just cover it tightly with foil or transfer it to an airtight container, and it’ll stay good for up to 4 days.

Freeze: This casserole is perfect for freezing! You can freeze the whole thing before baking, or cut leftovers into individual portions and wrap them up.

Reheat: To warm up your casserole, cover it with foil and pop it in a 350°F oven for about 20 minutes until heated through. You can also microwave individual portions for 1-2 minutes.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 3400-3700
• Protein: 145-165 g
• Fat: 220-250 g
• Carbohydrates: 155-180 g

Ingredients

For the casserole base:

• 1 package (30 oz) frozen shredded hash browns, thawed
• 2 cups cheddar cheese (shredded)

For the filling:

• 8 eggs (room temperature)
• 1 1/2 tsp salt
• 1/4 tsp garlic powder
• 1 lb pork sausage (I use Jimmy Dean)
• 1 tsp black pepper
• 1 1/2 cups whole milk or heavy cream

Step 1: Preheat Oven and Prepare Baking Dish

Preheat your oven to 375°F (190°C) and spray a 9 x 13-inch baking dish with non-stick cooking spray.

This will ensure the casserole doesn’t stick and makes cleanup easier.

Step 2: Brown the Pork Sausage

• 1 lb pork sausage (I use Jimmy Dean)

In a skillet over medium heat, cook the pork sausage, breaking it into small pieces as it browns.

Once fully cooked, drain off any excess grease.

Set the cooked sausage aside for assembling the casserole.

Step 3: Make the Egg Mixture

• 8 eggs (room temperature)
• 1 1/2 cups whole milk or heavy cream
• 1 1/2 tsp salt
• 1 tsp black pepper
• 1/4 tsp garlic powder

In a large bowl, whisk together the eggs, whole milk or heavy cream, salt, black pepper, and garlic powder until well combined.

I like to make sure the eggs are at room temperature so they blend more smoothly.

Step 4: Assemble the Casserole

• 1 package (30 oz) frozen shredded hash browns, thawed
• cooked pork sausage from Step 2
• 2 cups cheddar cheese (shredded)
• egg mixture from Step 3

Layer the casserole ingredients in the prepared baking dish: first spread out the thawed hash browns evenly, then scatter the cooked sausage from Step 2 over the top, sprinkle on the shredded cheddar cheese, and finally pour the egg mixture from Step 3 evenly over everything.

Step 5: Bake the Casserole

Cover the casserole dish with foil and bake in the preheated oven for 40 minutes.

Remove the foil and continue baking for another 20 minutes, until the eggs are set and the top is lightly browned.

I like to let the casserole rest for 5 minutes before slicing—it comes out cleaner this way.

Step 6: Serve

Slice the casserole into portions and serve warm.

For an extra kick, I like to top mine with a splash of Frank’s Hot Sauce or a spoonful of chunky salsa.

Best Breakfast Hashbrown Casserole

Delicious Best Breakfast Hashbrown Casserole recipe with step-by-step instructions.

5 from 1 vote

Print Recipe Pin Recipe

Prep Time 25 minutes mins

Cook Time 52 minutes mins

Total Time 1 hour hr 17 minutes mins

Servings 4

Calories 3550 kcal

Ingredients

  

For the casserole base:

• 1 package (30 oz) frozen shredded hash browns, thawed
• 2 cups cheddar cheese (shredded)

For the filling:

• 8 eggs (room temperature)
• 1 1/2 tsp salt
• 1/4 tsp garlic powder
• 1 lb pork sausage (I use Jimmy Dean)
• 1 tsp black pepper
• 1 1/2 cups whole milk or heavy cream

Instructions

 

• Preheat your oven to 375°F (190°C) and spray a 9 x 13-inch baking dish with non-stick cooking spray. This will ensure the casserole doesn’t stick and makes cleanup easier.
• In a skillet over medium heat, cook the pork sausage, breaking it into small pieces as it browns. Once fully cooked, drain off any excess grease. Set the cooked sausage aside for assembling the casserole.
• In a large bowl, whisk together the eggs, whole milk or heavy cream, salt, black pepper, and garlic powder until well combined. I like to make sure the eggs are at room temperature so they blend more smoothly.
• Layer the casserole ingredients in the prepared baking dish: first spread out the thawed hash browns evenly, then scatter the cooked sausage from Step 2 over the top, sprinkle on the shredded cheddar cheese, and finally pour the egg mixture from Step 3 evenly over everything.
• Cover the casserole dish with foil and bake in the preheated oven for 40 minutes. Remove the foil and continue baking for another 20 minutes, until the eggs are set and the top is lightly browned. I like to let the casserole rest for 5 minutes before slicing—it comes out cleaner this way.
• Slice the casserole into portions and serve warm. For an extra kick, I like to top mine with a splash of Frank’s Hot Sauce or a spoonful of chunky salsa.