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Best Cheesy Breakfast Casserole with Sausage

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This easy breakfast casserole combines sausage, cheese, and bread in a custardy, golden-baked dish that’s perfect for brunch or holiday mornings. Mix everything in one bowl for a no-fuss, crowd-pleasing meal.

Ingredients

Scale
  • 1 pound breakfast sausage
  • 8 large eggs
  • 2 cups whole milk
  • 1 teaspoon Dijon mustard
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/4 teaspoon smoked paprika (optional)
  • 6 cups cubed day-old bread (about 8–10 slices)
  • 2 cups shredded sharp cheddar cheese, divided
  • 1 cup shredded Monterey Jack cheese
  • 2 green onions, sliced (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. In a large skillet over medium-high heat, cook the breakfast sausage, breaking it up with a spatula, until browned (6-8 minutes). Transfer to a paper towel-lined plate to drain excess grease.
  3. In a large mixing bowl, whisk together eggs, milk, Dijon mustard, salt, black pepper, and smoked paprika (if using) until smooth and slightly frothy (about 1 minute).
  4. Add cubed bread, cooked sausage, and 1 1/2 cups of the shredded cheddar cheese to the egg mixture. Gently fold until bread is evenly coated and ingredients are distributed. Do not overmix.
  5. Pour the mixture into the greased baking dish and spread into an even layer. Sprinkle remaining 1/2 cup cheddar cheese and 1 cup Monterey Jack cheese evenly over the top.
  6. Bake for 35-40 minutes, until the top is golden brown and puffed, edges are bubbling, and center is set (a knife inserted into the middle should come out clean). If top browns too quickly, tent loosely with foil for the last 10 minutes.
  7. Let the casserole rest for 5-10 minutes before slicing. Sprinkle with sliced green onions before serving.

Notes

For overnight prep: Cover assembled unbaked casserole tightly and refrigerate up to 12 hours. Remove from fridge while oven preheats (about 20 minutes) and add 5-10 minutes to baking time. Use day-old bread for best texture; if using fresh bread, cube and dry in a 300°F oven for 5-7 minutes. Let casserole rest before slicing to allow custard to set.

Nutrition

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