This hearty breakfast casserole features layers of frozen hash browns, savory breakfast sausage, and a mountain of melted cheddar cheese, all baked in a rich egg custard. It’s the perfect make-ahead dish for feeding a crowd, with a crispy top and gooey, satisfying center.
Do not thaw the frozen hash browns; using them frozen prevents a soggy casserole. Let the casserole rest for at least 10 minutes after baking to set properly. For a make-ahead option, assemble the night before, cover, and refrigerate; bake as directed the next morning (you may need to add 5-10 minutes to the covered baking time).
Keywords: breakfast casserole, sausage casserole, hash brown casserole, cheesy breakfast casserole, make-ahead breakfast, crowd-pleasing breakfast, easy breakfast recipe