Why Make This Recipe
Cozy Christmas Breakfast Casserole is the perfect dish for holiday mornings. It combines simple ingredients to create a warm and filling meal that everyone will love. This recipe is easy to prepare and can even be made a day ahead, saving time during the busy holiday season. With its rich flavors and comforting textures, this casserole will surely become a family favorite.
How to Make Cozy Christmas Breakfast Casserole
Ingredients:
- 8 eggs
- 2 cups milk
- 1 cup cheddar cheese
- 1 cup Swiss cheese
- 1 small onion, chopped
- 1/2 cup cooked bacon or sausage
- 4 cups cubed bread
- 1/2 tsp salt
- 1/2 tsp pepper
- 1 tsp thyme
Directions:
- Preheat oven to 350°F and grease a casserole dish.
- Layer bread cubes, meat, and onion in the dish.
- In a bowl, whisk together eggs, milk, thyme, salt, and pepper.
- Pour the egg mixture over the bread mixture and top with cheese.
- Chill the casserole overnight in the fridge, or you can bake it immediately.
- Bake uncovered for 45–50 minutes until golden brown.
- Rest for 10 minutes before serving.

How to Serve Cozy Christmas Breakfast Casserole
Serve the casserole warm, cut into squares. It pairs wonderfully with fresh fruit, a sprinkle of powdered sugar, or a drizzle of maple syrup. You can also offer coffee or hot cocoa to complement this delicious dish.
How to Store Cozy Christmas Breakfast Casserole
If you have leftovers, store them in an airtight container in the refrigerator. They can be kept for up to 3 days. To reheat, simply place portions in the microwave or bake them in the oven until hot.
Tips to Make Cozy Christmas Breakfast Casserole
- For extra flavor, sauté the chopped onion until golden before adding it to the casserole.
- Feel free to mix in your favorite veggies, like bell peppers or spinach, for a healthier twist.
- You can use any type of bread you have on hand, such as sourdough or whole wheat.
Variation
Try substituting different cheeses or meats based on your preferences. You can also make a vegetarian version by omitting the bacon or sausage and adding more vegetables.
FAQs
Can I make this casserole ahead of time?
Yes! You can prepare it the night before and let it chill in the fridge. Just bake it in the morning.
Can I freeze leftovers?
Yes, you can freeze the casserole. Just make sure it cools completely before putting it in an airtight container. It can be frozen for up to 2 months.
What if I don’t have Swiss cheese?
You can substitute Swiss cheese with mozzarella or provolone for a different flavor.

Cozy Christmas Breakfast Casserole
Ingredients
Method
- Preheat oven to 350°F and grease a casserole dish.
- Layer the bread cubes, meat, and onion in the dish.
- In a bowl, whisk together eggs, milk, thyme, salt, and pepper.
- Pour the egg mixture over the bread mixture and top with cheese.
- Chill the casserole overnight in the fridge, or bake it immediately.
- Bake uncovered for 45–50 minutes until golden brown.
- Rest for 10 minutes before serving.