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A delicious prep-ahead breakfast casserole, ready for mornings

Savory Sausage, Spinach, and Cheddar Breakfast Casserole

A delicious and hearty breakfast casserole with savory sausage, fresh spinach, and sharp cheddar cheese, perfect for a crowd or meal prep. This make-ahead dish bakes up golden and bubbly, offering a comforting start to your day.
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Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings: 8 slices
Calories: 450
Ingredients Equipment Method Notes

Ingredients
  

Main Ingredients
  • 1 lb breakfast sausage cooked and crumbled
  • 10 oz fresh spinach wilted and squeezed dry
  • 10 large eggs
  • 1 cup milk
  • 1 tsp salt
  • 0.5 tsp black pepper
  • 0.25 tsp garlic powder
  • 4 cups cubed day-old bread (such as challah or brioche)
  • 2 cups shredded cheddar cheese
  • Cooking spray for greasing

Equipment

  • Large skillet
  • Colander
  • Large bowl
  • Whisk
  • 9x13 inch baking dish
  • Plastic wrap or foil

Method
 

Preparation
  1. Cook breakfast sausage in a large skillet until browned, then drain and set aside.
  2. Wilt spinach in the same skillet, then squeeze out excess water and set aside.
  3. Whisk together eggs, milk, salt, pepper, and garlic powder in a large bowl.
  4. Lightly spray a 9x13 inch baking dish with cooking spray.
Assembly
  1. Spread cubed bread evenly in the prepared baking dish.
  2. Distribute cooked sausage, wilted spinach, and 1.5 cups of cheddar cheese over the bread.
  3. Pour the egg mixture over everything, ensuring the bread is coated, and gently press down.
  4. Cover the dish and refrigerate for at least 8 hours or overnight.
Baking
  1. Preheat oven to 375°F (190°C) and remove casserole from refrigerator, uncovering it.
  2. Sprinkle remaining 0.5 cups of cheddar cheese over the top.
  3. Bake for 40-50 minutes until golden and cooked through; tent with foil if browning too quickly.
  4. Let the casserole rest for 5-10 minutes before slicing and serving.

Notes

For best results, allow the casserole to chill overnight to ensure the bread fully absorbs the egg mixture. You can customize this casserole by adding other vegetables like diced bell peppers or onions, or by using a different type of cheese.