The Base:

  • 1 lb breakfast sausage, mild or spicy

  • 1 package (30 oz) frozen shredded hashbrowns, thawed

  • 1 medium onion, chopped

  • 1 bell pepper, chopped (any color)

  • 2 cloves garlic, minced

The Creamy Layer:

  • 2 cups shredded cheddar cheese, divided

  • 1 cup sour cream

  • 1 can (10.5 oz) cream of mushroom soup

  • ½ cup milk

  • 4 large eggs

  • 1 teaspoon garlic powder

  • ½ teaspoon black pepper

  • ¼ teaspoon salt

The Crunchy Topping:

  • 1 cup crushed cornflakes or panko breadcrumbs

  • 2 tablespoons melted butter

  • 2 tablespoons grated Parmesan cheese

Simple Steps to Casserole Perfection

Step 1: Prepare the Sausage & Veggies

  1. Preheat oven to 375°F (175°C)

  2. In a large skillet, cook sausage over medium heat until browned, breaking it up as it cooks

  3. Add onion and bell pepper, cook until softened (about 5 minutes)

  4. Stir in garlic and cook 1 minute more

  5. Drain excess grease and set aside

Step 2: Create the Creamy Mixture

  1. In a large bowl, whisk together sour cream, soup, milk, eggs, and seasonings

  2. Stir in 1½ cups cheddar cheese until well combined

Step 3: Combine Everything

  1. Add thawed hashbrowns and sausage mixture to the creamy base

  2. Stir until everything is evenly coated

  3. Transfer to a greased 9x13 inch baking dish

Step 4: Add the Crunchy Topping

  1. In a small bowl, mix crushed cornflakes, melted butter, and Parmesan

  2. Sprinkle remaining ½ cup cheddar over casserole

  3. Top with cornflake mixture

Step 5: Bake to Golden Perfection

  1. Bake uncovered for 45-55 minutes

  2. Casserole is done when bubbly around edges and golden brown on top

  3. Let rest 10 minutes before serving

Pro Tips for the Best Casserole Ever

  • 🎯 Thaw Hashbrowns Properly: This prevents a watery casserole

  • 🔥 Customize the Heat: Use spicy sausage or add red pepper flakes

  • 🧀 Cheese Variations: Try pepper jack or Colby jack for different flavors

  • 🥓 Bacon Bonus: Add ½ cup cooked, crumbled bacon with the sausage

  • 🌱 Veggie Boost: Stir in 1 cup chopped spinach or mushrooms

Make-Ahead & Storage Instructions

Overnight Method:

  • Assemble completely (without topping)

  • Cover and refrigerate overnight

  • Add topping and bake as directed, adding 10-15 minutes to baking time

Freezer Friendly:

  • Assemble in freezer-safe dish (without topping)

  • Wrap tightly and freeze up to 3 months

  • Thaw in refrigerator overnight before baking

Leftovers:

  • Store covered in refrigerator 3-4 days

  • Reheat in oven or air fryer to maintain crispiness

Serving Suggestions

Classic Breakfast:

  • Serve with fresh fruit and orange juice

  • Add scrambled eggs on the side

Holiday Brunch Spread:

  • Pair with fresh fruit salad and muffins

  • Serve with mimosas or coffee bar

Comfort Dinner:

  • Enjoy with a simple green salad

  • Serve with roasted vegetables

Why This Recipe Never Fails

The beauty of this casserole lies in its perfect balance of textures and flavors. The crispy hashbrowns provide substance, the savory sausage delivers protein and flavor, the creamy sauce brings richness, and the crunchy topping adds that final satisfying contrast. It's a complete meal in one dish that appeals to all ages.

Now I'd love to hear from you! What's your favorite breakfast casserole? Do you have any special additions or family variations you'd like to share? Drop your tips and experiences in the comments below! 👇