This make-ahead breakfast casserole with sausage is the ultimate stress-free brunch dish. Assemble it the night before, refrigerate, and bake in the morning for a golden, custard-like casserole that’s packed with flavor and perfect for holidays or busy mornings.
For best texture, use day-old or toasted bread. Let casserole sit at room temperature before baking for even cooking. Use the knife test to check doneness. Do not overmix the egg mixture. The casserole can be refrigerated for up to 24 hours before baking. For variations, see the blog post for vegetarian, spicy Southwest, low-carb, dairy-free, and veggie versions.
Keywords: breakfast casserole, make-ahead breakfast, sausage casserole, overnight casserole, holiday breakfast, brunch recipe