This cheesy potato breakfast casserole is a hearty, comforting dish that’s perfect for feeding a crowd. Filled with perfectly cooked hash browns, savory sausage, melted cheddar cheese, and fluffy eggs, this casserole is a sure-fire hit for breakfast, brunch, or even dinner. The best part? It’s so easy to throw together, making it ideal for busy mornings or weekend gatherings.
I first made this Potato Breakfast Casserole for a Sunday brunch with friends, and it quickly became a household favorite. It’s such a versatile recipe—easy to customize with whatever ingredients you have on hand. Plus, it reheats beautifully, so leftovers are always a win. Let me walk you through everything you need to know to make this delicious breakfast bake a part of your regular rotation!
What You’ll Need to Make This Cheesy Potato Breakfast Casserole
Here’s everything you’ll need to whip up this cozy potato breakfast casserole. These simple, budget-friendly ingredients come together to create a dish that’s packed with flavor and texture.
- 1 pound Italian sausage, cooked – Adds savory, meaty flavor.
- 1 yellow onion, chopped and sautéed in sausage grease – A touch of sweetness that complements the sausage.
- 7 large eggs – Creates a fluffy, custardy base for the casserole.
- 1/2 cup of milk – Helps bind the casserole while keeping it creamy.
- 20-ounce bag of frozen diced hash browns – No need to thaw, making prep super quick and easy.
- 8-ounce brick of mild cheddar cheese, grated – The melty, cheesy goodness that ties the dish together.
- Salt and pepper to taste – Enhances all the flavors.
Kitchen Tools
- A 9×13-inch casserole dish
- Non-stick cooking spray
- Mixing bowl
- Wooden spoon or spatula
How to Make Cheesy Potato Breakfast Casserole
This recipe is straightforward, and even beginners can tackle it with ease. Follow these simple steps to create your cheesy potato breakfast casserole:
- Preheat the oven to 350°F. While it’s heating, lightly spray a 9×13-inch casserole dish with non-stick cooking spray. Set aside.
- Cook the sausage and onions. In a skillet, cook the Italian sausage over medium heat until browned. Add the chopped yellow onion and sauté in the sausage grease until the onion is fragrant and softened. Set aside to cool slightly.
- Combine the ingredients. In a large mixing bowl, whisk together the eggs, milk, salt, and pepper. Stir in the cooked sausage and onions, diced hash browns, and most of the grated cheddar cheese (reserving about 1 cup for later).
- Assemble the casserole. Pour the mixture into the prepared casserole dish and spread it evenly.
- Bake the casserole. Place the dish in the preheated oven and bake for 35 minutes.
- Add the remaining cheese. Remove the casserole from the oven, sprinkle the reserved cheese on top, and return it to the oven for another 8 minutes until melted and bubbly.
- Let it rest. Remove from the oven and allow the casserole to rest for 15–20 minutes before serving. This helps it set and makes slicing easier.
How to Serve Your Cheesy Potato Breakfast Casserole
This casserole is a crowd-pleaser, perfect for a weekend brunch or a potluck breakfast buffet. Serve it warm and slice it into squares for easy plating. Pair it with fresh fruit, a crisp green salad, or buttery toast for a balanced and satisfying meal. For a little extra flair, garnish with chopped fresh parsley or green onions right before serving.
Storing and Enjoying Leftovers
If you’re lucky enough to have leftovers, this Potato Breakfast Casserole stores beautifully! Here’s how:
- Refrigerate: Place leftovers in an airtight container and refrigerate for up to 4 days.
- Freeze: Slice into portions, wrap tightly in plastic wrap, and place in a freezer-safe bag for up to 2 months. Thaw overnight in the fridge before reheating.
- Reheat: Warm individual portions in the microwave for 1–2 minutes, or reheat an entire batch in a 350°F oven until heated through.
Top Tips for Customizing Your Cheesy Potato Breakfast Casserole
This recipe is endlessly adaptable! Here are a few easy ways to make it your own:
- Switch up the protein: Substitute the sausage with cooked bacon, diced ham, or even ground turkey or chicken.
- Add some veggies: Toss in diced bell peppers, spinach, or mushrooms for extra color and nutrition.
- Cheese it up: Try swapping cheddar with Monterey Jack, Swiss, or Pepper Jack cheese for a fun twist.
- Spice it up: Add a pinch of red pepper flakes or a dash of hot sauce to the mixture for a kick of heat.
Your Questions About Cheesy Potato Breakfast Casserole Answered
Can I make this casserole ahead of time?
Yes, this is a great make-ahead recipe! Assemble the casserole up to the baking step, cover it tightly, and refrigerate overnight. When you’re ready to bake, add 5–10 extra minutes to the cooking time since it will be cold from the fridge.
Do I need to thaw the hash browns first?
Nope! That’s one of the perks of this recipe. You can use frozen hash browns straight from the bag, saving you time and hassle.
What kind of casserole dish should I use?
A standard 9×13-inch glass or ceramic dish works perfectly here. Just remember to use non-stick spray before adding the ingredients!
Can I double the recipe?
Absolutely! If you’re cooking for a larger crowd, simply double the ingredients and divide between two 9×13 pans. Bake them side by side in the oven.
What’s the best way to reheat leftovers?
For the best texture, reheat slices in a 350°F oven until warmed through. The microwave works too for quicker results—just keep in mind the edges may be slightly softer.
Give This Cheesy Potato Breakfast Casserole a Try!
This cheesy potato breakfast casserole is everything you want in a breakfast dish: hearty, flavorful, and ridiculously easy to make. Whether you’re serving it for a family brunch, holiday gathering, or just a cozy weekend breakfast, it’s sure to be a hit. I’d love to hear how it turns out for you! Leave a comment below, or tag me on social media to show off your casserole creation. And if you’re looking for more easy breakfast ideas, don’t forget to check out my other recipes!
Cheesy Potato Breakfast Casserole: An Easy Family Favorite
Equipment
- 9×13-inch casserole dish
- Non-stick cooking spray
- mixing bowl
- Wooden spoon or spatula
Ingredients
- 1 pound Italian sausage cooked
- 1 yellow onion chopped and sautéed in sausage grease
- 7 large eggs
- 1/2 cup milk
- 20 ounce bag frozen diced hash browns No need to thaw
- 8 ounce brick mild cheddar cheese grated
- Salt and pepper to taste
Instructions
- Preheat the oven to 350°F. While it’s heating, lightly spray a 9×13-inch casserole dish with non-stick cooking spray. Set aside.
- Cook the sausage and onions. In a skillet, cook the Italian sausage over medium heat until browned. Add the chopped yellow onion and sauté in the sausage grease until the onion is fragrant and softened. Set aside to cool slightly.
- Combine the ingredients. In a large mixing bowl, whisk together the eggs, milk, salt, and pepper. Stir in the cooked sausage and onions, diced hash browns, and most of the grated cheddar cheese (reserving about 1 cup for later).
- Assemble the casserole. Pour the mixture into the prepared casserole dish and spread it evenly.
- Bake the casserole. Place the dish in the preheated oven and bake for 35 minutes.
- Add the remaining cheese. Remove the casserole from the oven, sprinkle the reserved cheese on top, and return it to the oven for another 8 minutes until melted and bubbly.
- Let it rest. Remove from the oven and allow the casserole to rest for 15–20 minutes before serving. This helps it set and makes slicing easier.
