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Overnight Cheesy Sausage and Hashbrown Breakfast Casserole

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A hearty, make‑ahead breakfast casserole layered with frozen hash browns, savory sausage, melty cheese, and an egg‑milk custard—assembled the night before for an effortless, flavorful morning meal.

  • Total Time: 1 hour 5 minutes to 1 hour 25 minutes
  • Yield: 10 to 12 servings

Ingredients

4 cups frozen hash browns, thawed

1 pound breakfast sausage (bulk or links, crumbled)

2 cups shredded cheddar cheese (or cheese blend of choice)

8 large eggs

2 cups milk (or evaporated milk/light cream)

1 teaspoon salt

1/2 teaspoon black pepper

1/2 teaspoon garlic powder

1/2 teaspoon onion powder

1 teaspoon Dijon mustard (optional)

Instructions

  1. Preheat a skillet over medium heat. Brown the sausage until no longer pink, then drain the excess fat.
  2. Grease a 9×13‑inch baking dish. Spread the thawed hash browns evenly in the bottom of the dish.
  3. Layer the cooked sausage over the hash browns, followed by 1 1/2 cups of the shredded cheese.
  4. In a large bowl, whisk together the eggs, milk, salt, pepper, garlic powder, onion powder, and Dijon mustard if using.
  5. Pour the egg mixture evenly over the layered ingredients in the dish.
  6. Cover the dish with foil and refrigerate overnight or for at least 12 hours.
  7. When ready to bake, preheat the oven to 350°F (175°C). Remove the casserole from the fridge and uncover.
  8. Top with the remaining 1/2 cup of cheese if desired, and bake uncovered for 45–65 minutes, or until the center is set and the top is golden and bubbly.
  9. Let the casserole rest for 10 minutes before slicing and serving.

Notes

  • Thaw hash browns fully to avoid a soggy casserole.
  • Customize with vegetables like bell peppers, mushrooms, or green chiles.
  • Can be assembled up to 48 hours ahead using pasteurized eggs.
  • Leftovers can be refrigerated for up to 4 days or frozen for 3–4 months.
  • Serve with salsa, sour cream, or fresh fruit for a complete meal.
  • Author: Julia
  • Prep Time: 20 minutes
  • Cook Time: 45–65 minutes
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American
  • Diet: Halal

Nutrition

  • Serving Size: 1 slice (1/12 of casserole)
  • Calories: 320
  • Sugar: 2g
  • Sodium: 680mg
  • Fat: 23g
  • Saturated Fat: 9g
  • Unsaturated Fat: 12g
  • Trans Fat: 0g
  • Carbohydrates: 12g
  • Fiber: 1g
  • Protein: 16g
  • Cholesterol: 195mg