Hash Brown Breakfast Casserole

When you want something different from traditional breakfast dishes this Hash Brown Breakfast Casserole offers a delicious twist. This cheesy hash brown casserole recipe is hearty and simple and packed with flavor which makes it perfect for cozy family breakfasts or holiday gatherings.

This recipe is perfect for Christmas morning or Easter brunch or a weekend family breakfast or even a quick weeknight dinner. If you want more easy breakfast ideas then also check out these Crispy Christmas Morning Home Fries for another delicious way to enjoy breakfast potatoes.

I love how the tender shredded potatoes soak up the creamy egg mixture while the sausage adds plenty of savory flavor and the cheese melts into a beautiful golden topping. Everything bakes together in one dish and creates a comforting breakfast that everyone can enjoy around the table.

Ingredients

Here is what I use for this recipe :

• Frozen shredded hash browns: Thawed and thoroughly drained shredded potatoes create the hearty base of the casserole while absorbing the seasoned egg mixture and developing lightly golden edges during baking.
• Breakfast sausage: Fully cooked and crumbled breakfast sausage adds rich savory flavor and satisfying protein while creating delicious little pockets throughout the casserole.
• Large eggs: Large eggs bind the shredded potatoes and other ingredients together while creating a fluffy and tender breakfast casserole as they bake.
• Whole milk: Whole milk combines with the eggs to create a smooth custard mixture that keeps the casserole tender and prevents the filling from becoming too dry.
• Shredded sharp cheddar cheese: Shredded cheddar adds a rich cheesy flavor and melts into the casserole while forming a lightly browned topping with naturally uneven melted patches.
• Red bell pepper: Finely diced red bell pepper adds a naturally sweet flavor and colorful pieces that remain visible throughout the baked breakfast casserole.
• Green onions: Thinly sliced green onions add a mild onion flavor while their green tops provide a fresh finishing touch when scattered over the cooked casserole.
• Garlic powder: Garlic powder provides an even savory seasoning that blends easily into the egg mixture without leaving noticeable pieces.
• Salt: Salt enhances the natural flavors of the potatoes and eggs while balancing the richness of the sausage and cheese.
• Black pepper: Freshly ground black pepper adds gentle warmth and seasoning throughout the creamy breakfast casserole.
• Unsalted butter: Softened butter coats the baking dish to help prevent sticking while encouraging the potato edges to develop a lightly golden finish.

Tools I Use :

• 9 by 13 inch ceramic baking dish: Holds the layered potatoes and sausage and egg mixture while distributing oven heat evenly and creating a lightly golden casserole crust.
• Large mixing bowl: Provides enough room to combine the eggs and milk and seasonings without spilling while creating a consistent custard mixture.
• Whisk: Blends the eggs and milk and dry seasonings into a smooth mixture that distributes evenly throughout the casserole.
• Wooden cutting board: Provides a stable surface for dicing the bell pepper and slicing the green onions before they are added to the casserole.
• Sharp kitchen knife: Cuts the bell pepper into small pieces and produces thin green onion slices for even distribution and finishing.
• Measuring cups and spoons: Measure the milk and shredded cheese and dry seasonings accurately to maintain the correct texture and flavor balance.
• Colander: Helps drain thawed shredded hash browns so excess moisture does not collect in the finished breakfast casserole.
• Rubber spatula: Helps spread the potato layer gently and transfer finished casserole portions without breaking them apart excessively.
• Oven: Provides steady heat that sets the egg filling while softening the potatoes and melting the cheddar into a golden topping.
• Instant read food thermometer: Checks that the egg mixture in the center has reached 160 degrees Fahrenheit before the casserole is served.

Instructions

Step 1: Dice the bell pepper and slice the green onions

Begin by making sure the frozen hash browns are completely thawed and thoroughly drained. Gently squeeze out any excess moisture because watery potatoes can make the finished casserole too soft. Make sure the breakfast sausage is already fully cooked and crumbled before assembling the casserole. Place the red bell pepper on a wooden cutting board and remove the stem and seeds before cutting the pepper into small irregular pieces. Slice the three green onions into thin rounds and separate the green tops for the finishing garnish. The colorful vegetables should remain in loose little piles with naturally uneven sizes.

Tip: Keep the bell pepper pieces relatively small so they soften during baking and distribute evenly among the potatoes.

Step 2: Whisk the eggs with milk and seasonings

Crack all eight eggs into a large mixing bowl and add the whole milk. Sprinkle in the garlic powder and salt and black pepper before whisking until the yolks and whites are combined into a smooth pale yellow mixture. The mixture should become slightly frothy around the edges while remaining thin enough to flow between the shredded potatoes later. Small bubbles and a few darker pepper specks should remain visible throughout the liquid.

Tip: Whisk until the eggs and milk are fully combined but avoid excessive whipping because a gentle mixture bakes into a tender filling.

Step 3: Layer the hash browns with sausage and vegetables

Preheat the oven to 375 degrees Fahrenheit and coat a 9 by 13 inch ceramic baking dish with the softened butter. Spread the thawed and well drained hash browns across the bottom of the dish and gently press them into a loose even layer without packing them tightly. Scatter the cooked crumbled breakfast sausage over the potatoes and follow with the diced red bell pepper and the white portions of the green onions. Some pieces should settle between the shredded potatoes while others remain visible on top. The casserole should look naturally uneven with colorful ingredients distributed across the dish.

Tip: Avoid pressing the potatoes into a compact layer because leaving small spaces helps the egg mixture spread throughout the casserole.

Step 4: Pour the seasoned eggs and scatter the cheddar cheese

Slowly pour the whisked egg and milk mixture over the layered hash browns and sausage. Move the pour across different sections of the baking dish so the liquid can flow between the potato shreds and around the vegetables. Gently shift any exposed potatoes that remain completely dry so they make contact with the egg mixture. Scatter two cups of shredded sharp cheddar cheese across the top and allow some potato shreds and red pepper pieces to remain visible. The uncooked casserole should have a pale yellow filling beneath an uneven blanket of orange cheese with small pockets of sausage and vegetables showing through.

Tip: Distribute the cheese loosely instead of packing it down so the topping melts naturally and develops appealing golden patches.

Step 5: Bake until the eggs set and the cheese turns golden

Place the assembled casserole in the preheated oven and bake uncovered for approximately 40 to 45 minutes. As the casserole cooks the egg mixture gradually firms around the potatoes while the cheddar melts into the surface and the edges begin turning lightly golden brown. Continue baking until the center is set and a thermometer inserted into the egg filling reaches 160 degrees Fahrenheit. The cheese should have irregular golden patches and the potato edges should look lightly crisp. Remove the casserole from the oven and allow it to rest for about 5 minutes so the filling settles before slicing.

Tip: Check the center rather than judging only by the browned edges because the middle needs to be fully set before serving.

Step 6: Slice and serve a warm casserole portion

After the casserole has rested use a spatula to divide it into eight generous portions. Carefully transfer one square portion onto a white serving plate while keeping the golden cheesy top visible. The cut edges should reveal tender shredded potatoes and fluffy cooked eggs with small pieces of sausage and bell pepper tucked throughout. Scatter a small amount of the reserved green onion tops over the warm serving. Allow a few shreds of potato and small crumbs to fall naturally beside the slice while the melted cheese remains soft and slightly uneven. Serve immediately while the inside is warm and the edges still have a little crisp texture.

Tip: Let the casserole rest before cutting so the slices hold together better while the interior stays soft and creamy.

Pro Tips

• Thaw the hash browns completely and squeeze out extra moisture before baking so the casserole holds together without becoming watery.
• Use freshly shredded sharp cheddar when possible because it melts smoothly and creates a rich topping with naturally golden edges.
• Choose fully cooked and well drained breakfast sausage so the casserole stays flavorful without collecting excess grease during baking.
• Let the finished casserole rest for about five minutes before slicing because the egg filling firms slightly and portions hold together better.

Storage Instructions

Refrigeration: Allow the Hash Brown Breakfast Casserole to cool slightly after baking and transfer leftovers into airtight containers within two hours. Refrigerate promptly and keep at 40 degrees Fahrenheit or below for up to three to four days. Store individual portions separately when possible so you can reheat only the amount needed for breakfast. Freezing: Allow the casserole to cool before dividing it into individual servings. Wrap each portion tightly and place the wrapped slices inside freezer safe containers or bags.

Freeze for up to two months for the best texture and label each package with the preparation date so it is easy to keep track of leftovers. Reheating: Reheat refrigerated portions in the microwave until steaming hot and the center reaches 165 degrees Fahrenheit. For a slightly crispier texture place a portion in an oven safe dish and warm at 350 degrees Fahrenheit until heated completely through.

Cover loosely if the cheese begins to brown too much before the center becomes hot. Make Ahead Preparation: Assemble the casserole in the baking dish without baking and cover tightly before placing it in the refrigerator overnight. Keep the assembled casserole refrigerated for no more than 24 hours before baking. When ready to cook remove it from the refrigerator while the oven preheats and bake until the eggs are fully set and the center reaches 160 degrees Fahrenheit. A chilled casserole may need a few additional minutes in the oven.

Frequently Asked Questions

See You in the Kitchen

This Hash Brown Breakfast Casserole is a great way to satisfy your hearty breakfast cravings without spending the whole morning cooking.

I typically prepare a batch of Cinnamon Chocolate Chip Scones or Cottage Cheese Crème Brûlée Stuffed French Toast when I make my casserole and that way all of my breakfast favorites will be ready for the same family brunch.

Even my kids love this one!

Print