Sausage Potato Breakfast Casserole with Peppers

Prep: 20 minCook: 1 hr 15 min12 servingsmediumAmerican
Sausage Potato Breakfast Casserole with Peppers

Hearty breakfast casserole layering crispy hash brown potatoes, seasoned Italian sausage, sautéed peppers and onions, and sharp Cheddar cheese bound with a savory egg custard. Clarified butter creates golden, crispy potatoes while the egg mixture sets into a tender, protein-rich dish ideal for feeding a crowd.

Ingredients

12 servings
  • 1 lb mild Italian pork sausage
    mild chicken or turkey sausage1:1poultry

    removes pork

  • 1 lb spicy Italian pork sausage
    spicy chicken or turkey sausage1:1poultry

    removes pork

  • 3 russet potatoes, peeled and shredded
  • 1 ½ teaspoons salt, divided
  • ½ teaspoon black pepper
  • 2 teaspoons dried Italian herbs
  • 1 red bell pepper, sliced
  • 1 Vidalia onion, sliced
  • 1 cup shredded sharp Cheddar cheese
    Gruyere or Swiss1:1dairydairy-free

    different flavor profile

    Full guide →
  • 6 large eggs
  • 2 cups milk
    heavy cream1:1dairy

    richer custard

    Full guide →
  • 1 stick butter
    ghee1:1dairy-free alternative

    pre-clarified

    Full guide →
  • 1 tbsp olive oil
  • cooking spray, for greasing

Instructions

  1. 1

    Melt butter over medium-low heat and skim foam from surface.

  2. 2

    Pour clarified butter through a strainer lined with cheesecloth into a heat-safe bowl, stopping before milky solids at bottom. Cool slightly.

  3. 3

    Soak shredded potatoes in cold water until water turns cloudy. Drain and rinse in colander.

  4. 4

    Squeeze potatoes in a lint-free kitchen towel to remove excess moisture, then wring out a second time.

  5. 5

    Heat clarified butter in a heavy skillet over medium-high heat. Spread potatoes in skillet, sprinkle with salt and pepper, and cook undisturbed until golden-brown crust forms on bottom.

  6. 6

    Flip potatoes in sections using a silicone spatula, add more clarified butter if needed, and continue cooking until uniformly golden-brown.

  7. 7

    Cook mild and spicy sausages together in a large skillet over medium-high heat, stirring to crumble, until fat renders and no pink remains. Drain.

  8. 8

    Wipe skillet, add olive oil, then cook peppers and onions over medium-high heat until soft and translucent.

  9. 9

    Combine potatoes, sausage, pepper-onion mixture, and cheese.

  10. 10

    Coat a baking dish with cooking spray and add potato-sausage mixture.

  11. 11

    Whisk together eggs, milk, Italian herbs, and remaining salt. Pour evenly over mixture.

  12. 12

    Bake at 350 degrees for 40 to 45 minutes until eggs are set and no longer jiggly. Rest 10 minutes before serving.

Tips

Tip 1

Clarifying butter removes milk solids that would otherwise burn at high heat, allowing potatoes to achieve deep golden color without scorching.

Tip 2

Thoroughly wring out shredded potatoes to remove starch and excess moisture, which prevents a soggy casserole and promotes crispy texture.

Tip 3

Do not stir potatoes during initial cooking phase; undisturbed contact with hot skillet creates the crust.

Good to Know

Storage

Cover and refrigerate up to 3 days. Reheat covered at 350 degrees until warmed through.

Make Ahead

Assemble casserole through step 9 (before pouring egg mixture). Cover and refrigerate overnight. Pour egg mixture and bake as directed, adding 5-10 minutes to baking time.

Serve With

Let rest 10 minutes after baking for easier portioning. Serve warm with hot sauce, salsa, or sour cream.

See pairing guide →

Common Mistakes

Watch

Do not skip potato moisture-removal step to avoid a soggy, watery casserole.

Watch

Do not stir potatoes during initial searing to avoid breaking apart before crust forms.

Watch

Do not overfill the baking dish to prevent egg mixture from overflowing.

Watch

Do not skip the 10-minute rest period to avoid breaking apart when serving.

Substitutions

Dairy-Free Swaps

butter
ghee1:1dairy-free alternative

pre-clarified

Full guide →
sharp Cheddar cheese
Gruyere or Swiss1:1dairydairy-free

different flavor profile

Full guide →
milk
heavy cream1:1dairy

richer custard

Full guide →

Vegan Options

milk
unsweetened plant-based milk1:1vegan

may affect texture

Full guide →

General Alternatives

mild Italian pork sausage
mild chicken or turkey sausage1:1poultry

removes pork

spicy Italian pork sausage
spicy chicken or turkey sausage1:1poultry

removes pork

Find more substitutions →