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Easy Make-Ahead Sausage Breakfast Casserole Recipe for Busy Mornings

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A comforting and hearty make-ahead breakfast casserole featuring savory sausage, fluffy eggs, and melty cheese, perfect for busy mornings or meal prep.

Ingredients

Scale
  • 1 pound breakfast sausage (pork, spicy or mild)
  • 6 cups cubed day-old bread (white, sourdough, or rustic Italian loaf)
  • 8 large eggs, room temperature
  • 2 cups whole milk or half-and-half (can substitute 2% milk)
  • 2 cups shredded sharp cheddar cheese
  • 1 cup shredded mozzarella cheese
  • 1 small yellow onion, finely diced
  • 2 cloves garlic, minced
  • 1 teaspoon mustard powder (optional)
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • Fresh parsley or chives, chopped (optional, for garnish)

Instructions

  1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or non-stick spray.
  2. Heat a large skillet over medium heat. Add the sausage, breaking it up with a spatula. Cook until browned and no longer pink, about 7–8 minutes. Drain excess fat if necessary.
  3. Add diced onions to the skillet with the sausage and cook until translucent, about 3 minutes. Stir in minced garlic and cook for another 30 seconds. Remove from heat and set aside.
  4. Cube day-old bread into roughly 1-inch pieces and place in a large mixing bowl.
  5. In another bowl, whisk together eggs, milk, mustard powder, salt, and pepper until well combined.
  6. Pour the egg mixture over the bread cubes, stirring gently to coat every piece. Let sit for about 5 minutes to soak.
  7. Fold in the cooked sausage, onions, and garlic. Stir in 1 cup shredded cheddar cheese and 1/2 cup mozzarella cheese, reserving the rest for topping.
  8. Pour the mixture into the prepared baking dish and spread evenly. Sprinkle the remaining cheddar and mozzarella on top.
  9. Bake uncovered for 45–55 minutes, or until the casserole is set, bubbly, and the top is lightly browned. A knife inserted in the center should come out mostly clean.
  10. Let the casserole cool for 5–10 minutes to firm up. Garnish with fresh parsley or chives if desired. Slice and serve warm.

Notes

Brown the sausage well for extra flavor. Use day-old or stale bread to avoid sogginess. Let bread soak in egg mixture for 5 minutes before baking. Check casserole at 40 minutes to prevent over-browning; tent with foil if needed. Leftovers store well in fridge up to 4 days and freeze up to 2 months.

Nutrition

Keywords: sausage breakfast casserole, make-ahead breakfast, easy breakfast casserole, meal prep breakfast, cheesy sausage casserole

Find it online: https://emmaoven.com/easy-make-ahead-sausage-breakfast-casserole-recipe-for-busy-mornings/