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Delicious overnight sausage hashbrown casserole fresh out of the oven

Overnight Sausage Hashbrown Casserole

This make-ahead casserole combines breakfast sausage, frozen hashbrowns, and cheese, soaked overnight for a creamy texture and browned topping, making it a perfect dish for busy mornings or holiday brunches.
Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Course Breakfast, Brunch
Cuisine American
Servings 8 servings
Calories 450 kcal

Ingredients
  

Casserole Mixture

  • 1 pound breakfast sausage (mild or spicy) Can swap for turkey sausage for a leaner option.
  • 30 oz frozen hashbrowns Shredded or diced work fine; no need to thaw.
  • 1 cup shredded cheddar cheese Sharp cheddar boosts flavor.

Custard Mixture

  • 6 large eggs
  • 2 cups milk Whole milk gives the creamiest result; 2% works too.
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1/2 teaspoon garlic powder
  • 1/2 teaspoon onion powder

Instructions
 

Preparation

  • Heat a skillet over medium. Add the breakfast sausage and cook, breaking it up with a spoon, until browned and cooked through, about 6–8 minutes. Drain off any excess fat and set the sausage aside to cool slightly.
  • In a large bowl, combine the cooked sausage, frozen hashbrowns, and shredded cheddar. Stir until evenly mixed.
  • In a separate bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, and onion powder until smooth and slightly frothy.
  • Pour the egg mixture over the sausage-hashbrown-cheese mixture. Stir gently until everything is coated and evenly distributed.
  • Transfer the mixture to a greased 9x13-inch baking dish, smoothing the top with a spatula. Cover the dish tightly with plastic wrap or foil and refrigerate overnight.

Baking

  • The next morning, remove the casserole from the fridge while your oven preheats to 350°F (175°C).
  • Bake uncovered for 45–50 minutes, or until the center is set and the top is golden brown.
  • Let the casserole rest for 5–10 minutes before slicing.

Notes

Serve with a dollop of sour cream or salsa for brightness. Great with fresh fruit or salad on the side. Leftovers can be used in sandwiches.
Keyword Breakfast Casserole, Hashbrown Casserole, Make-Ahead Breakfast, Overnight Casserole, Sausage Casserole