This Cheesy Potato Breakfast Casserole is a warm and tasty way to start your day! With layers of fluffy potatoes, gooey cheese, and eggs, it’s like a hug on a plate.
It’s perfect for busy mornings or brunch with friends! I love making this on weekends when I want something cozy and delicious without much effort. Yum!
Key Ingredients & Substitutions
Hash Brown Potatoes: Frozen hash browns save time, but fresh grated potatoes work too! If you’re short on time, store-bought varieties are convenient. You can even use sweet potatoes for a twist!
Breakfast Sausage: While I love using breakfast sausage for its flavor, you can swap it for diced ham, crumbled turkey sausage, or even leave it out for a vegetarian option. Just make sure to adjust your seasoning accordingly!
Cheddar Cheese: Sharp cheddar adds a punch, but feel free to mix in mozzarella or pepper jack for a different flavor. You could also use dairy-free cheese if you need a lactose-free option.
Eggs: Eggs are essential for binding, but if you want a vegan version, try using a mix of silken tofu and nutritional yeast for a similar texture.
Green Onions: If you don’t have green onions, chives or diced bell peppers make great substitutes, adding both color and flavor!
How Do I Ensure My Casserole is Cooked Just Right?
Cooking time can vary, but the best way to know your casserole is done is to look for a few key signs. The top should be golden brown and a knife inserted in the center should come out clean. Here’s a quick checklist:
- Preheat the oven to the right temperature before baking to ensure even cooking.
- Keep an eye on the casserole during the last 10 minutes of baking to avoid burning.
- Let it rest for 5-10 minutes after baking. This helps everything set and makes for easier slicing.
Enjoy your cooking adventure! There’s nothing like a homemade breakfast casserole to fuel your day!

Cheesy Potato Breakfast Casserole
Ingredients You’ll Need:
Main Ingredients:
- 4 cups frozen hash brown potatoes (thawed)
- 1 cup cooked breakfast sausage, crumbled
- 1 cup shredded cheddar cheese
- 6 large eggs
- 1 cup milk
- 1/4 cup chopped green onions (plus extra for garnish)
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/2 teaspoon garlic powder
- 1/2 teaspoon onion powder
- Optional: cooked bacon bits for topping
How Much Time Will You Need?
This delicious breakfast casserole takes about 15 minutes to prepare and then 35 to 45 minutes to bake. After baking, it’s good to let it cool for about 5 minutes before serving. All in all, you can have a warm, cheesy casserole ready to enjoy in about an hour!
Step-by-Step Instructions:
1. Preheat the Oven:
First, preheat your oven to 350°F (175°C). This ensures that your casserole will bake evenly.
2. Prepare the Dish:
Lightly grease a 9×13 inch baking dish (or any similar-sized casserole dish) so that your casserole doesn’t stick while baking.
3. Layer the Hash Browns:
Spread the thawed hash brown potatoes evenly across the bottom of the prepared dish. This will be the base of your casserole.
4. Add the Sausage and Cheese:
Next, sprinkle the crumbled cooked sausage over the hash browns. Then, take half of your shredded cheddar cheese and sprinkle it on top.
5. Mix the Egg Mixture:
In a medium mixing bowl, whisk together the six large eggs, milk, salt, black pepper, garlic powder, and onion powder until well combined. This will create a creamy mixture that will hold everything together.
6. Incorporate Green Onions:
Stir the chopped green onions into your egg mixture. This adds some fresh flavor and color to the casserole.
7. Combine the Layers:
Pour the egg and green onion mixture evenly over the layers of potatoes, sausage, and cheese in the casserole dish.
8. Top with Cheese:
Sprinkle the remaining cheddar cheese over the top of the casserole for that delicious, gooey goodness when it bakes!
9. Bake:
Bake your casserole uncovered in the preheated oven for 35 to 45 minutes. You’ll know it’s ready when the eggs are fully set and the cheese is melted and golden brown on top.
10. Cool and Garnish:
Once baked, remove the casserole from the oven and let it cool for about 5 minutes. This resting time helps everything settle.
11. Serve and Enjoy:
Garnish with extra chopped green onions and optional cooked bacon bits if desired. Serve warm and enjoy your delicious, cheesy breakfast casserole!
Can I Use Fresh Potatoes Instead of Frozen Hash Browns?
Absolutely! You can use fresh grated potatoes, but be sure to wash and peel them first. You’ll need to par-cook them slightly to ensure they bake evenly with the eggs in the casserole.
Can I Make This Casserole Ahead of Time?
Yes, you can prepare the casserole the night before! Assemble the dish, cover it tightly, and store it in the refrigerator. When you’re ready to bake, allow it to sit at room temperature for about 30 minutes before placing it in the oven. It may need an extra 5 to 10 minutes of baking time.
How Do I Store Leftovers?
Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, simply place individual portions in the microwave or warm them in the oven until heated through.
Can I Add Other Ingredients?
Absolutely! Feel free to customize your casserole by adding ingredients like diced bell peppers, spinach, or mushrooms. Just make sure to keep the quantities balanced so the casserole doesn’t become too watery or crowded!



