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Ultimate Make-Ahead Christmas Breakfast Casserole with Sausage and Hash Browns

A golden-brown slice of savory christmas breakfast casserole with melted cheese and visible sausage filling.
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Prepare this hearty sausage, egg, and cheese casserole the night before for an easy, stress-free Christmas morning brunch. It feeds a crowd and bakes up perfectly.

Ingredients

Scale
  • 1 pound breakfast sausage, cooked and drained
  • 1 (32 ounce) package frozen hash brown potatoes, thawed
  • 1 1/2 cups shredded sharp cheddar cheese, divided
  • 10 large eggs
  • 2 cups milk
  • 1 teaspoon dry mustard powder
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper

Instructions

  1. Lightly grease a 9×13 inch baking dish.
  2. Spread the thawed hash browns evenly over the bottom of the prepared dish.
  3. Sprinkle the cooked sausage over the hash browns.
  4. Sprinkle 1 cup of the cheddar cheese over the sausage layer.
  5. In a large bowl, whisk together the eggs, milk, dry mustard, salt, and pepper until fully combined.
  6. Pour the egg mixture evenly over the layers in the baking dish.
  7. Cover the dish tightly with plastic wrap. Refrigerate for at least 4 hours, or preferably overnight.
  8. When ready to bake, preheat your oven to 350 degrees F (175 degrees C). Remove the plastic wrap.
  9. Bake for 40 minutes.
  10. Remove the casserole from the oven and sprinkle the remaining 1/2 cup of cheddar cheese over the top.
  11. Return to the oven and bake for another 10 to 15 minutes, or until the eggs are set and the cheese is melted and lightly golden.
  12. Let the casserole rest for 5 minutes before slicing and serving.

Notes

  • For a slow cooker option, assemble the casserole in the slow cooker insert (omit the final cheese sprinkle). Cook on low for 6 to 8 hours or on high for 3 to 4 hours. Sprinkle remaining cheese on top during the last 30 minutes of cooking.
  • You can substitute ham for the sausage if you prefer a different flavor profile.
  • If you need to bake immediately, let the assembled casserole sit at room temperature for 30 minutes before placing it in the preheated oven, then increase the initial bake time by 5 minutes.

Nutrition

Find it online: https://kitchenslang.com/christmas-breakfast-casserole-recipe/