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Overnight Breakfast Casserole Recipe

4.5 from 131 reviews

This Overnight Breakfast Casserole is a simple and delicious make-ahead dish perfect for busy mornings. It features layers of crunchy bread, fresh vegetables, eggs, milk, and melted cheese baked to golden perfection. Prepare it the night before, refrigerate, and enjoy a warm, hearty breakfast without the morning rush.

Ingredients

Scale

Egg Mixture

  • 8 large eggs
  • 2 cups milk
  • Salt, to taste
  • Black pepper, to taste

Bread

  • 6 cups cubed day-old bread (French or white bread works well)

Vegetables

  • 1 cup diced bell peppers
  • 1 cup chopped spinach or kale
  • 1/2 cup diced onions
  • 1/2 cup sliced mushrooms (optional)

Cheese

  • 2 cups shredded cheddar cheese

Instructions

  1. Prepare the bread and vegetables: Cube day-old bread into bite-sized pieces. Chop and dice your vegetables as desired.
  2. Assemble the casserole: In a greased 9×13-inch baking dish, layer the bread cubes, evenly distribute the chopped vegetables, and sprinkle the shredded cheese on top.
  3. Mix the egg mixture: In a large bowl, whisk together the eggs, milk, salt, and black pepper until fully combined.
  4. Pour egg mixture: Pour the egg and milk mixture evenly over the layered bread, vegetables, and cheese, ensuring all bread pieces are soaked.
  5. Refrigerate overnight: Cover the casserole dish tightly with plastic wrap or aluminum foil and refrigerate for at least 8 hours or overnight. This allows the bread to soak up the egg mixture thoroughly.
  6. Bake in the morning: Preheat your oven to 350°F (175°C). Remove the cover and bake the casserole for 45-55 minutes, or until the top is golden brown and the center is set. A knife inserted in the middle should come out clean.
  7. Serve: Let the casserole sit for 5 minutes before slicing. Serve warm and enjoy your hassle-free, nutritious breakfast.

Notes

  • You can customize the vegetables based on what you have, such as adding tomatoes, zucchini, or broccoli.
  • Use whole grain bread for a healthier option.
  • For extra flavor, add cooked sausage, bacon, or ham.
  • This casserole can be prepared ahead and also freezes well for future breakfasts.
  • If you prefer a dairy-free version, substitute milk and cheese with plant-based alternatives.

Keywords: overnight casserole, breakfast casserole, make ahead breakfast, baked eggs, vegetable breakfast bake