Overnight Breakfast Casserole with Bacon

slice of breakfast casserole with bacon on a white plate

Overnight Breakfast Casserole with Bacon

Overnight Breakfast Casserole is an egg strata loaded with bacon, cheese, spinach, and caramelized onions. This hearty breakfast is perfect for Christmas morning!

4.7 from 17 votes

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Prep Time: 25

Cook Time: 40

Additional Time: 8

Total Time: 9 5

Servings: 8

Calories: 595kcal

Ingredients

12 oz. bacon (about 10 slices)
1 medium yellow onion (chopped)
2 cloves garlic (minced)
5 cups fresh spinach
8 eggs
2 cups half and half
1/2 teaspoon salt
1/2 teaspoon black pepper
1 Tablespoon chopped chives
8 cups bread cubes (I prefer day old sourdough or crusty French bread)
1 cup shredded Swiss cheese
1 cup shredded cheddar cheese

Instructions

In a large skillet, fry the bacon until crispy. Remove the cooked strips to a paper towel lined plate and allow to cool.
Remove all but 1 Tablespoon of the bacon fat from the skillet. Add the onion and saute until soft and translucent, about 6-7 minutes. Stir in the garlic and spinach and saute for another minute or so or until spinach is wilted.
Meanwhile, in a mixing bowl, whisk together the eggs, half and half, salt, pepper, and chives.
In a greased 9 x 13 inch baking dish, layer the bread cubes, half the cheeses, the spinach and onion mixture and then the bacon. Pour the egg custard evenly over the top. Sprinkle with remaining cheese. Cover with saran wrap and refrigerate overnight or for at least 6 hours.
Remove the casserole from the fridge and allow it to sit at room temperature for 20 minutes while the oven is preheating to 350 degrees. Remove the saran wrap and bake for 35-40 minutes or until cheese is melted and edges are golden brown. Serve immediately.

Notes

To freeze the breakfast casserole, follow the instructions through step 5. After the dish is covered in saran wrap, wrap it again with aluminum foil. Freeze for up to 3 months. Thaw the dish overnight in the refrigerator then bake as instructed above.
Half and half may be substituted with either milk or cream if desired.