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An overhead view of a breakfast casserole.

Sourdough Breakfast Casserole

4.47 from 13 votes
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Course: Sourdough Recipes
Cuisine: American
Prep Time: 20 minutes
Cook Time: 40 minutes
Additional Time: 2 hours
Total Time: 3 hours
Servings: 6 servings
Calories: 656kcal
Author: Dolly {Little Home in the Making}

Ingredients

  • 6 eggs
  • 2 cups whole milk
  • 1 teaspoon salt
  • ½ teaspoon ground dry mustard
  • 6 slices sourdough bread cut into 1” cubes (approximately 6-7 cups)
  • 1 pound breakfast sausage links cooked and cut into 1” pieces (or bacon)
  • 1 ½ cups shredded cheese

Instructions

Cook Mode
  • Add the eggs to a very large bowl, and whisk them until all of the yolks are broken.
  • Pour in the milk, add the ground dry mustard and salt, and whisk to combine.
  • Add in the cubed sourdough bread, as well as the cooked and diced sausage (or bacon). Stir well to combine and coat the bread with the egg and milk mixture.
  • Add in the shredded cheese, and fold it in until well combined.
  • Grease a 9X13 baking dish with butter or avocado oil, and pour the breakfast casserole mixture into the dish.
  • Cover the casserole and place it in the fridge for at least 2 hours, or up to overnight.
  • When you’re ready to bake, place the dish in a cold oven, and then heat it to 350ºF.
  • Once the oven has preheated (with the dish inside), start the cook time. Bake for 35-45 minutes, or until the center is set.
  • Bake covered with foil or a lid if you like a soft texture, or uncovered if you like crispy edges and a crispy top.
  • Once the egg is set in the center, remove from the oven and allow to cool for 5 minutes before slicing and serving.

Notes

Leftovers: Reheat leftovers by placing the covered dish in a cold oven and heating it to 300ºF. Once the casserole is warmed through, serve and enjoy.
With bacon: If you prefer, you can use 1 pound of bacon (cooked and chopped) in place of the sausage links in this recipe.
Type of bread: Sourdough works very well for this recipe, but you can use 6-7 cups of any cubed bread you prefer. Italian or French style loaves work very well, and loaves that are a day old (or older) are preferred.
Make ahead: Prepare this casserole the night before and store in the fridge overnight. Place the dish into a cold oven in the morning and bake as directed.

Nutrition

Serving: 1g | Calories: 656kcal | Carbohydrates: 39g | Protein: 36g | Fat: 39g | Saturated Fat: 15g | Polyunsaturated Fat: 20g | Cholesterol: 287mg | Sodium: 1644mg | Fiber: 1g | Sugar: 8g
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