Dinner

Hashbrown Breakfast Casserole with Sausage, Eggs, and Cheddar Recipe

Name: Hashbrown Breakfast Casserole with Sausage, Eggs, and Cheddar Recipe
Prep time: 15 min
Cook time: 50 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 1 pound ground breakfast sausage; ½ small yellow onion, finely diced; ½ red bell pepper, diced; ½ green bell pepper, diced; 28 oz. shredded hash browns, thawed and patted dry; 4 tablespoons butter, melted; 2 cups cheddar cheese, divided in half; 12 large eggs; 1 cup sour cream; ¾ cup milk; 1 teaspoon hot sauce; ½ teaspoon mustard powder; ¼ teaspoon dried oregano; ¼ teaspoon dried thyme; ¼ teaspoon ground sage; ½ teaspoon salt; ¼ teaspoon pepper

BySophie Carsel January 1, 2026January 1, 2026

Jump to Recipe

Introduction

This hearty Hashbrown Breakfast Casserole is a perfect way to start your day with a satisfying mix of sausage, veggies, and cheesy goodness. It combines tender hashbrowns with a flavorful egg custard, making it great for family breakfasts or brunch gatherings.

The image shows a thick slice of a layered casserole being lifted from a white dish with a light wooden spatula. The casserole slice has multiple layers; the bottom layer is a smooth, pale yellow egg base with some texture, followed by a thicker, colorful top layer filled with browned sausage pieces, red and green bell pepper chunks, melted golden cheese, and small bits of green herbs. The top layer looks slightly crispy and bubbly with a mix of bright colors from the vegetables and cheese melting together. The background surface is a white marbled texture, and the casserole in the baking dish shows more pieces with the same layers visible. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

1 pound ground breakfast sausage
½ small yellow onion, finely diced
½ red bell pepper, diced
½ green bell pepper, diced
28 oz. shredded hash browns, thawed and patted dry
4 tablespoons butter, melted
2 cups cheddar cheese, divided
12 large eggs
1 cup sour cream
¾ cup milk
1 teaspoon hot sauce
½ teaspoon mustard powder
¼ teaspoon dried oregano
¼ teaspoon dried thyme
¼ teaspoon ground sage
½ teaspoon salt
¼ teaspoon pepper

Instructions

Step 1: Place your oven rack in the middle and preheat the oven to 350°F (175°C).
Step 2: In a skillet over medium-high heat, cook and crumble the breakfast sausage until browned and cooked through. Add the diced onions and bell peppers during the last 3 minutes of cooking. Drain excess grease and set aside.
Step 3: In a medium bowl, crack the eggs and beat until just combined.
Step 4: Stir in the sour cream, milk, hot sauce, mustard powder, oregano, thyme, sage, salt, and pepper until well mixed.
Step 5: Lightly grease a 9 x 13-inch casserole dish. Add the thawed hash browns and drizzle with melted butter. Toss gently to coat evenly.
Step 6: Sprinkle 1 cup of cheddar cheese over the hash browns. Top with the cooked sausage, onions, and peppers.
Step 7: Pour the egg mixture evenly over the sausage and hash browns, then sprinkle the remaining 1 cup of cheddar cheese on top.
Step 8: Bake uncovered for about 50 minutes. Start checking every 5 minutes after 45 minutes; the casserole is done when the edges are golden and the center is nearly set. It will continue to firm up as it rests.
Step 9: Let the casserole rest for 10 minutes before serving to allow it to set nicely.

Tips & Variations

Use turkey sausage for a leaner option or switch cheddar for pepper jack for a bit of spice.
Adding a handful of chopped fresh herbs like parsley or chives before serving can brighten the flavors.
If you prefer a smoother texture, mix the sour cream and eggs well to avoid lumps.
For extra veggies, add mushrooms or spinach along with the peppers and onions.

Storage

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat individual portions in the microwave for 1-2 minutes until warm, or in a 350°F oven for about 15 minutes. This casserole also freezes well; thaw overnight in the refrigerator before reheating.

How to Serve

A close-up of a square slice of layered breakfast casserole being lifted by a wooden spatula. The casserole has several layers: a bottom layer of soft, pale yellow eggs, topped with a mix of ground sausage pieces, chopped red and green bell peppers, and melted golden cheese. The top layer also shows bits of browned sausage and more melted cheese sprinkled with finely chopped green herbs. The casserole sits in a white baking dish with more casserole inside, placed on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I prepare this casserole the night before?

Yes, you can assemble the casserole the night before and keep it covered in the refrigerator. Bake it fresh in the morning, adding a few extra minutes to the baking time if starting cold.