This easy Biscuit Breakfast Casserole combines refrigerated biscuits, breakfast sausage, eggs, and cheddar cheese in one delicious dish! With just 10 minutes of prep time and 6 simple ingredients, it's perfect for weekend brunch, Christmas morning, or feeding a crowd!
Preheat oven to 350°F with the rack in the middle position. Lightly grease a 9×13-inch baking dish with cooking spray.
In a large mixing bowl, whisk together the eggs and milk until combined.
Cut each refrigerated biscuit into quarters and add to the egg mixture. Gently toss until all the biscuit pieces are coated.
Add the chopped scallions, shredded cheddar cheese, and cooked, crumbled breakfast sausage. Gently stir until combined.
Pour the egg mixture evenly into the prepared baking dish, spreading out the biscuit pieces and sausage.
Bake for 28-30 minutes, or until the top is golden brown, the eggs are set, and the biscuits are cooked through.
Remove from the oven and let the casserole rest for 1-2 minutes before slicing and serving. Enjoy!
Notes
Biscuits: Pillsbury Grands work great, but other brands of refrigerated biscuit dough can be used.
Sausage: Cook, crumble, and drain the sausage before adding it to the casserole. Cooked bacon or diced ham can also be used.
Make Ahead: Assemble the casserole, cover tightly, and refrigerate overnight. Remove the foil and bake as directed, adding a few extra minutes if needed.
Storage: Keep leftovers in an airtight container in the refrigerator for 3-4 days or freeze for up to 3 months.
Reheating: Microwave individual slices in 30-second increments until heated through, or reheat in the air fryer at 350°F for about 5-10 minutes.