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A traditional breakfast egg casserole, golden brown and freshly baked.

Hearty Sausage and Potato Breakfast Casserole with Cheddar

This hearty breakfast casserole features savory sausage, tender potatoes, and sharp cheddar cheese baked in a custardy egg base, perfect for a satisfying morning meal or brunch.
Prep Time 20 minutes
Cook Time 55 minutes
Total Time 1 hour 15 minutes
Servings 8 people
Calories 350 kcal

Equipment

  • Large skillet
  • 9x13 inch baking dish
  • Large bowl

Ingredients
  

Main Ingredients

  • 12 large eggs
  • 1 cup milk or half-and-half
  • 1 teaspoon salt
  • 0.5 teaspoon black pepper
  • 1 tablespoon olive oil
  • 1 pound breakfast sausage, crumbled
  • 2 cups cooked, diced potatoes can use leftover roasted potatoes or pre-cooked frozen hash brown potatoes
  • 1 medium onion, chopped
  • 1 bell pepper (any color), chopped
  • 2 cups shredded sharp cheddar cheese, divided
  • Cooking spray or butter for greasing the dish
  • Fresh chives or parsley for garnish (Optional)

Instructions
 

Preparation

  • Heat olive oil in a large skillet, cook crumbled breakfast sausage until browned, drain grease, and set aside.
  • In the same skillet, sauté chopped onion and bell pepper until softened; cook raw potatoes until tender if using.
  • Lightly grease a 9x13 inch baking dish with cooking spray or butter.

Assembly

  • Spread cooked potatoes, sausage, sautéed onions, and bell peppers evenly in the dish, then sprinkle with 1 cup of cheddar cheese.
  • Whisk together eggs, milk, salt, and pepper until well combined and slightly frothy.
  • Pour the egg mixture over the layered fillings, gently pressing ingredients to submerge them.
  • Sprinkle the remaining 1 cup of shredded cheddar cheese over the top.

Baking & Serving

  • Preheat oven to 350°F (175°C) and bake for 45-60 minutes until set and golden brown; tent with foil if browning too quickly.
  • Let the casserole rest for 5-10 minutes before slicing and serving, garnishing with fresh chives or parsley if desired.

Notes

This casserole is perfect for meal prepping; assemble it the night before and refrigerate, then bake in the morning for a quick and delicious breakfast. Ensure potatoes are fully cooked before baking in the casserole for best texture.