This Overnight Breakfast Casserole is a simple and tasty dish perfect for busy mornings. You can prepare it the night before, allowing the flavors to meld while you sleep. In the morning, all you have to do is pop it in the oven, and you’ll have a wonderful breakfast ready to serve.
Why Make This Recipe
This casserole is a fantastic choice for anyone who wants to start the day with a hearty meal without spending all morning in the kitchen. It’s easy to prepare, and you can customize it with your favorite ingredients. Whether you’re feeding a family or hosting a brunch, this dish is sure to please everyone.
How to Make Overnight Breakfast Casserole
Ingredients:
- 1 pound breakfast sausage
- 6 eggs
- 2 cups milk
- 1 cup shredded cheese (cheddar or similar)
- 4 cups diced bread (like French or Italian)
- Salt and pepper to taste
- Optional: chopped vegetables (like bell peppers or onions)
Directions:
- Cook the sausage in a skillet over medium heat until browned, then drain.
- In a bowl, whisk together the eggs and milk.
- In a greased baking dish, layer the bread, cooked sausage, and cheese.
- Pour the egg mixture over the top, ensuring everything is coated.
- Cover the dish with plastic wrap and refrigerate overnight.
- Preheat the oven to 350°F (175°C).
- Remove the wrap and bake for 45-55 minutes or until the center is set and the top is golden.
- Let it cool slightly before serving.
How to Serve Overnight Breakfast Casserole
Once your casserole is out of the oven and slightly cooled, cut it into squares. You can serve it warm, and it pairs well with fresh fruit or a side of yogurt. This dish is also great on its own and can be enjoyed for brunch or breakfast during the week.
How to Store Overnight Breakfast Casserole
If you have leftovers, store them in an airtight container in the fridge. The casserole will stay fresh for about 3-4 days. You can reheat individual portions in the microwave or warm up the whole dish in the oven.
Tips to Make Overnight Breakfast Casserole
- Feel free to add chopped vegetables to the casserole for extra flavor and nutrition.
- Adjust the amount of cheese based on your preference.
- For a spicier kick, consider adding some chopped jalapeños or using spicy sausage.
Variation
You can make a vegetarian version by skipping the sausage and adding more vegetables instead. Spinach, mushrooms, or zucchini can all work well in this dish.
FAQs
Can I use any type of bread for this casserole?
Yes, you can use any sturdy bread, but French or Italian bread works best because it holds its texture well.
Can I freeze this casserole?
Yes, you can freeze the casserole before baking. Just cover it well and freeze. When ready to bake, thaw it overnight in the fridge and then bake as usual.
How long should I bake the casserole if it was frozen?
If you’re baking it from frozen, you may need to increase the baking time to about 60-70 minutes. Make sure to check that it’s cooked through.

Overnight Breakfast Casserole
Ingredients
Method
- Cook the sausage in a skillet over medium heat until browned, then drain.
- In a bowl, whisk together the eggs and milk.
- In a greased baking dish, layer the bread, cooked sausage, and cheese.
- Pour the egg mixture over the top, ensuring everything is coated.
- Cover the dish with plastic wrap and refrigerate overnight.
- Preheat the oven to 350°F (175°C).
- Remove the wrap and bake for 45-55 minutes or until the center is set and the top is golden.
- Let it cool slightly before serving.