21 Overnight Breakfast Casserole Ideas

Starting your day with a wholesome breakfast sets a positive tone for the rest of your day, but time is often our greatest adversary. Who has time to whip up a lavish breakfast amidst the hustle and bustle of daily life? Enter the overnight breakfast casserole—your ultimate solution for enjoying a delicious morning meal without the early morning scramble. Here, we present 20 innovative overnight breakfast casserole ideas that are not only delectable but also simple to prepare.

What is an Overnight Breakfast Casserole?

An overnight breakfast casserole is a dish that combines various breakfast staples—such as eggs, bread, vegetables, and cheese—which is assembled the night before and left to sit overnight. In the morning, all you need to do is pop it in the oven, allowing the flavors to meld beautifully while your home fills with tempting aromas. Plus, these casseroles are perfect for serving large crowds, making them ideal for family gatherings or brunch parties.

1. Classic Egg and Sausage Casserole

A true breakfast classic, this egg and sausage casserole features layers of cubed bread, savory sausage, and a rich egg mixture. Toss in some shredded cheddar cheese and season with herbs for a comforting start to your day.

Ingredients:

• 1 lb. breakfast sausage
• 8 eggs
• 2 cups milk
• 1 loaf of bread, cubed
• 2 cups shredded cheddar cheese
• Salt and pepper to taste

Instructions:

1. Brown the sausage in a skillet and drain the excess fat.
2. In a large bowl, whisk together eggs, milk, salt, and pepper.
3. In a greased casserole dish, layer the bread, sausage, and cheese.
4. Pour the egg mixture over the top.
5. Cover and refrigerate overnight. Bake at 350°F (175°C) for 45 minutes.

2. Veggie-Packed Spinach and Feta Casserole

This vegetarian option is loaded with fresh spinach, bell peppers, and crumbled feta cheese for a Mediterranean twist. The combination of eggs and veggies is both nutritious and filling.

Ingredients:

• 6 eggs
• 1 cup milk
• 3 cups fresh spinach, chopped
• 1 cup bell peppers, diced
• 1 cup crumbled feta
• Salt and pepper to taste

Instructions:

1. Whisk together eggs, milk, salt, and pepper.
2. In a greased dish, layer spinach, bell peppers, and feta.
3. Pour the egg mixture over the layers.
4. Refrigerate overnight and bake at 375°F (190°C) for 40 minutes.

3. Sweet Potato and Chorizo Casserole

This flavorful casserole features sweet potatoes balanced with spicy chorizo for a satisfying breakfast. Topped with cheese, it’s a dish you’ll crave.

Ingredients:

• 2 large sweet potatoes, diced
• 1 lb. chorizo, cooked and crumbled
• 8 eggs
• 2 cups milk
• 1 cup shredded mozzarella cheese
• Salt and pepper to taste

Instructions:

1. Preheat the oven to 400°F (200°C) and roast sweet potatoes until tender.
2. In a bowl, mix cooked chorizo, sweet potatoes, and cheese.
3. Whisk eggs and milk, then pour over the mixture in a greased dish.
4. Refrigerate overnight and bake at 350°F (175°C) for 45 minutes.

See also 10 Easy to Make Fruit Platter Ideas

4. Apple Cinnamon Overnight Oats Casserole

Perfect for a sweet start to your morning, this casserole blends oats, apples, and cinnamon for a cozy breakfast option.

Ingredients:

• 2 cups rolled oats
• 2 cups milk or almond milk
• 2 apples, diced
• ½ cup brown sugar
• 1 tsp cinnamon
• ½ cup walnuts, chopped

Instructions:

1. Mix all ingredients in a bowl, making sure to coat the oats and apples well.
2. Transfer to a greased casserole dish and refrigerate overnight.
3. Bake at 350°F (175°C) for 30 minutes for a warm, delicious treat.

5. Southwest Breakfast Casserole

Bring some heat to your breakfast table with this Southwest-inspired casserole bursting with flavors and textures.

Ingredients:

• 1 can black beans, drained and rinsed
• 1 cup corn
• 1 cup diced tomatoes
• 1 jalapeño, diced
• 8 eggs
• 2 cups milk
• 1 cup shredded cheese

Instructions:

1. Layer beans, corn, tomatoes, and jalapeños in a greased dish.
2. Whisk eggs and milk, then pour over layers.
3. Refrigerate overnight and bake for 45 minutes at 375°F (190°C).

6. Bacon and Cheese Breakfast Casserole

Nothing beats bacon for breakfast, and this casserole is the perfect way to indulge.

Ingredients:

• 1 lb. bacon, cooked and crumbled
• 8 eggs
• 2 cups milk
• 1 loaf of bread, cubed
• 2 cups shredded cheese (cheddar or your choice)
• Salt and pepper

Instructions:

1. In a greased dish, layer cubed bread, cooked bacon, and cheese.
2. Whisk together eggs and milk, season, and pour over the layers.
3. Refrigerate overnight and bake for 30-40 minutes at 350°F (175°C).

7. Blueberry Lemon Breakfast Casserole

This bright and fruity casserole is ideal for spring and summer mornings.

Ingredients:

• 2 cups bread, cubed
• 2 cups blueberries (fresh or frozen)
• Zest of 1 lemon
• 4 eggs
• 2 cups milk
• ½ cup sugar

Instructions:

1. In a dish, combine bread, blueberries, and lemon zest.
2. Whisk eggs, milk, and sugar, then pour it over the bread mixture.
3. Refrigerate overnight and bake at 350°F (175°C) for 35 minutes.

8. Zucchini and Tomato Breakfast Casserole

This vegetarian casserole is a great way to sneak in veggies for breakfast.

Ingredients:

• 2 cups zucchini, sliced
• 2 cups tomatoes, diced
• 1 cup ricotta cheese
• 6 eggs
• 2 cups milk

Instructions:

1. Layer zucchini and tomatoes in a greased dish, dollop with ricotta.
2. Whisk eggs and milk, pour over the vegetables.
3. Refrigerate overnight and bake for 40 minutes at 350°F (175°C).

9. French Toast Casserole

This sweet breakfast casserole turns traditional French toast into a fun, easy dish.

Ingredients:

• 1 loaf of bread, cubed
• 6 eggs
• 2 cups milk
• ½ cup sugar
• 1 tsp vanilla extract
• ½ tsp cinnamon

Instructions:

1. In a bowl, whisk together eggs, milk, sugar, vanilla, and cinnamon.
2. Layer the cubed bread in a greased dish and pour the egg mixture on top.
3. Refrigerate overnight and bake at 350°F (175°C) for 45 minutes.

See also 12 Mother’s Day Chocolate Strawberry Ideas

10. Peach and Cream Cheese Breakfast Casserole

This delightful combo of peaches and cream cheese is perfect for a sweet morning treat.

Ingredients:

• 2 cups diced peaches (fresh or canned)
• 1 cup cream cheese, cubed
• 6 eggs
• 2 cups milk
• ½ cup sugar

Instructions:

1. Assemble peaches and cream cheese in a greased dish.
2. Whisk together eggs, milk, and sugar, then pour over the fruit.
3. Refrigerate overnight and bake at 350°F (175°C) for 40 minutes.

11. Smoked Salmon and Cream Cheese Bagel Casserole

For a gourmet touch, whip up this smoked salmon bagel casserole that captures the essence of a classic brunch.

Ingredients:

• 6 bagels, cut into pieces
• 8 oz. smoked salmon, chopped
• 8 oz. cream cheese, cubed
• 6 eggs
• 2 cups milk
• Capers and dill for garnish

Instructions:

1. In a greased dish, layer bagel pieces, salmon, and cream cheese.
2. Whisk eggs and milk, pour over layers.
3. Refrigerate overnight, then bake at 350°F (175°C) for 40 minutes. Garnish with capers and dill.

12. Pesto and Tomato Breakfast Casserole

This savory casserole blends the vibrant flavors of pesto with ripe tomatoes for a fresh breakfast option.

Ingredients:

• 4 cups cherry tomatoes, halved
• 1 cup pesto
• 6 eggs
• 2 cups milk
• 1 cup mozzarella cheese

Instructions:

1. Layer halved tomatoes in a greased dish, dollop pesto on top.
2. Whisk eggs and milk, pour over layers, and top with cheese.
3. Refrigerate overnight and bake at 375°F (190°C) for 30-35 minutes.

13. Choco-Banana Overnight Casserole

Indulge in a dessert-like breakfast casserole that’s perfect for special occasions.

Ingredients:

• 2 cups banana slices
• 1 cup chocolate chips
• 6 eggs
• 2 cups milk
• ½ cup sugar
• ½ tsp vanilla extract

Instructions:

1. Layer banana slices and chocolate chips in a greased dish.
2. Whisk together eggs, milk, sugar, and vanilla, then pour over bananas.
3. Refrigerate overnight and bake at 350°F (175°C) for 40 minutes.

14. Herbed Mushroom and Cheese Casserole

This casserole is packed with umami flavors, perfect for mushroom lovers.

Ingredients:

• 2 cups mushrooms, sliced
• 1 cup cheese (Swiss or Gruyère)
• 6 eggs
• 2 cups milk
• 1 tbsp mixed herbs (thyme, rosemary, and parsley)

Instructions:

1. Sauté mushrooms until tender; then layer in a greased dish with cheese.
2. Whisk eggs, milk, and herbs, pour over layers.
3. Refrigerate overnight and bake at 375°F (190°C) for 35-40 minutes.

15. Quiche Lorraine Casserole

Bring a taste of France to your breakfast table with this rich and hearty casserole.

Ingredients:

• 1 lb. bacon, cooked and crumbled
• 8 eggs
• 2 cups milk
• 1 cup shredded Gruyère cheese
• Salt and pepper to taste

Instructions:

1. Layer bacon and cheese in a greased dish.
2. Whisk eggs and milk, pour over layers, and season.
3. Refrigerate overnight and bake at 350°F (175°C) for 40 minutes.

See also 20 Delicious Winter Dinner Recipe Ideas

16. Thai Peanut Chicken Breakfast Casserole

A creative twist, this casserole brings bold Thai flavors right to your breakfast.

Ingredients:

• 2 cups cooked chicken, shredded
• 1 cup peanut sauce
• 8 eggs
• 2 cups milk
• 1 cup mixed vegetables (bell pepper, carrots)

Instructions:

1. Layer chicken, veggies, and drizzle with peanut sauce in a greased dish.
2. Whisk eggs and milk, pour over the layers.
3. Refrigerate overnight and bake at 350°F (175°C) for 40-45 minutes.

17. Breakfast Burrito Casserole

Bring the flavors of a breakfast burrito to the table with this Mexican-inspired casserole.

Ingredients:

• 4 tortillas, cut into strips
• 1 can refried beans
• 8 eggs
• 2 cups milk
• 1 cup salsa
• 1 cup shredded cheese

Instructions:

1. Layer tortillas, beans, salsa, and cheese in a greased dish.
2. Whisk eggs and milk, pour over layers.
3. Refrigerate overnight and bake at 350°F (175°C) for 30-35 minutes.

18. Mediterranean Frittata Casserole

Indulge in the vibrant flavors of the Mediterranean with this savory casserole.

Ingredients:

• 1 cup cherry tomatoes, halved
• 1 cup olives, sliced
• 1 cup feta cheese, crumbled
• 8 eggs
• 2 cups milk

Instructions:

1. Layer tomatoes, olives, and feta in a greased dish.
2. Whisk eggs and milk, then pour over layers.
3. Refrigerate overnight and bake at 350°F (175°C) for 40 minutes.

19. Pumpkin Spice Breakfast Casserole

Embrace fall flavors with this delightful breakfast casserole that combines pumpkin and spices.

Ingredients:

• 2 cups pumpkin puree
• 6 eggs
• 2 cups milk
• ½ cup sugar
• 1 tsp pumpkin pie spice

Instructions:

1. Mix all ingredients in a bowl until smooth.
2. Pour into a greased dish and refrigerate overnight.
3. Bake at 350°F (175°C) for about 40 minutes.

20. Asparagus and Goat Cheese Casserole

Elevate your breakfast with this elegant asparagus and goat cheese casserole.

Ingredients:

• 2 cups asparagus, trimmed and cut
• 8 oz. goat cheese, crumbled
• 6 eggs
• 2 cups milk
• Salt and pepper to taste

Instructions:

1. Layer asparagus and goat cheese in a greased dish.
2. Whisk eggs and milk, pour over layers, and season.
3. Refrigerate overnight and bake at 375°F (190°C) for about 40 minutes.

Conclusion

Whether you prefer sweet or savory, vegan or meaty, these 20 overnight breakfast casserole ideas provide a variety of options to suit any palate. The beauty of these casseroles lies in their versatility; feel free to adjust flavors and ingredients to match your tastes or dietary needs.

With a little planning and a few ingredients, you can wake up to a delightful breakfast ready to serve, making mornings more manageable and enjoyable.

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By exploring these delicious overnight breakfast casserole ideas, you’ll find yourself enjoying more relaxed mornings and satisfying breakfast meals for your entire family. So grab your favorite ingredients, get creative, and let the deliciousness unfold!