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Overnight Sausage Breakfast Casserole


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  • Author: Lina
  • Total Time: 6 hours 65 minutes (including refrigeration time)
  • Yield: 8 servings 1x
  • Diet: Contains Gluten (can be modified to Gluten Free using cauliflower), Contains Dairy and Meat (can be customized)

Description

Overnight Sausage Breakfast Casserole is a hearty and flavorful dish combining savory ground sausage, fluffy eggs, melted cheese, and day-old bread soaked in a creamy custard. Perfect for make-ahead breakfasts, brunches, or light dinners, this casserole simplifies busy mornings with a comforting and crowd-pleasing meal that’s easy to customize to your taste.


Ingredients

Scale

Main Ingredients

  • 1 lb ground sausage (spicy or mild)
  • 8 large eggs
  • 2 cups milk
  • 2 cups shredded cheddar cheese (or mozzarella/pepper jack)
  • 4 cups day-old bread, cubed
  • 1 medium onion, diced
  • Salt, to taste
  • Black pepper, to taste
  • Optional: 1/2 tsp paprika or red pepper flakes

Instructions

  1. Cook the Sausage: Brown the ground sausage in a large skillet over medium heat, breaking it into small pieces for even texture. Once cooked through, drain excess fat and let it cool slightly.
  2. Prepare the Egg Mixture: In a large mixing bowl, whisk together eggs, milk, salt, pepper, and any optional spices until smooth to create a custard base.
  3. Assemble the Casserole: Grease a baking dish generously. Layer the cubed bread evenly at the bottom, then sprinkle cooked sausage and diced onion over the bread. Add a generous layer of shredded cheese. Pour the egg mixture evenly over all ingredients, gently pressing the bread to soak up the liquid.
  4. Refrigerate Overnight: Cover the dish tightly with foil or plastic wrap and place in the refrigerator for at least 6 hours or overnight to allow the bread to absorb the egg custard.
  5. Bake and Serve: Preheat the oven to 350°F (175°C). Remove the casserole from the refrigerator, uncover, and bake for 45 to 55 minutes until the top is golden and the center is set. Let rest a few minutes before slicing and serving.

Notes

  • Use day-old or slightly stale bread to absorb the egg mixture better and avoid sogginess.
  • Refrigerate the assembled casserole overnight to fully develop flavors and texture.
  • Distribute sausage and cheese evenly for consistent flavor in every bite.
  • If the casserole browns too fast while baking, loosely cover with foil halfway through.
  • Allow leftovers to cool before storing in the refrigerator to maintain moisture and texture.
  • Prep Time: 15 minutes
  • Cook Time: 50 minutes
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 slice (1/8 of casserole)
  • Calories: 350 kcal
  • Sugar: 2 g
  • Sodium: 600 mg
  • Fat: 25 g
  • Saturated Fat: 10 g
  • Unsaturated Fat: 12 g
  • Trans Fat: 0.5 g
  • Carbohydrates: 15 g
  • Fiber: 1 g
  • Protein: 18 g
  • Cholesterol: 220 mg