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A baked effortless breakfast casserole dish with eggs, cheese, and sausage

Classic Effortless Breakfast Casserole Dish

This classic breakfast casserole is truly effortless, allowing you to prepare it the night before and simply bake it in the morning. Packed with savory sausage, fresh vegetables, and cheesy goodness, it's the perfect crowd-pleasing dish for a special brunch or a relaxed weekend breakfast.
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Prep Time 25 minutes
Cook Time 55 minutes
Total Time 1 hour 20 minutes
Servings 8 servings
Calories 450 kcal

Equipment

  • 9x13 inch baking dish
  • large skillet
  • large bowl
  • spatula

Ingredients
  

Bread Layer

  • 6-8 slices day-old sourdough bread crusts removed, cubed

Sausage & Veggie Layer

  • 1 lb bulk breakfast sausage cooked and crumbled
  • 1 cup chopped green bell peppers
  • 1/2 cup chopped yellow onion
  • 1 cup fresh spinach

Cheese

  • 1.5 cups shredded sharp Cheddar cheese

Egg Mixture

  • 8 large eggs
  • 1.5 cups whole milk
  • 1/2 cup heavy cream optional
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1/4 teaspoon garlic powder

For Greasing

  • 1 tablespoon butter

Instructions
 

Preparation

  • Grease a 9x13 inch baking dish and spread the cubed bread evenly at the bottom.
  • Cook and crumble the bulk breakfast sausage in a large skillet, then drain excess fat.
  • Add onion and bell peppers to the skillet with the sausage, sauté until softened, and stir in spinach until wilted.

Layering the Casserole

  • Sprinkle the sausage and vegetable mixture over the bread cubes, then scatter 1 cup of shredded Cheddar cheese over this layer.

Egg Mixture & Refrigeration

  • Whisk together eggs, milk, optional heavy cream, salt, pepper, and garlic powder until combined.
  • Pour the egg mixture over the layers, ensuring all bread is moistened, and gently press down.
  • Sprinkle with the remaining 1/2 cup of Cheddar cheese, cover, and refrigerate for at least 4 hours or overnight.

Baking

  • Preheat oven to 350°F (175°C) and remove the casserole from the refrigerator 30 minutes before baking.
  • Bake for 45-60 minutes until set, golden brown, and a knife inserted comes out clean.
  • Let the casserole rest for 5-10 minutes before slicing and serving.

Notes

For best results, prepare the casserole the night before so the bread has ample time to soak up the egg mixture, resulting in a more custardy and flavorful dish.