Overnight Croissant Breakfast Casserole

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| Published on:

October 12, 2025

Overnight Croissant Breakfast Casserole

Overnight Croissant Breakfast Casserole is a warm and delightful dish that is perfect for breakfast or brunch. It is a great way to start your day with a delicious meal that you can prepare the night before. This casserole uses flaky croissants, eggs, and cheese to create a rich and creamy texture. It is filled with tasty ingredients like beef or sausage, which gives it a hearty feel. Not only is it easy to make, but it also feeds a crowd, making it ideal for gatherings or family mornings. You can enjoy it with a warm cup of coffee or fresh juice for a complete breakfast experience.

This recipe is also flexible. You can change the ingredients based on what you have at home. It is a great way to use up leftover croissants and other breakfast foods. The best part? You wake up to a warm casserole that only needs to be baked in the morning. You can spend more time enjoying your meal and less time in the kitchen.

Why Youโ€™ll Love This Overnight Croissant Breakfast Casserole

This Overnight Croissant Breakfast Casserole is full of flavor and easy to prepare. Itโ€™s a comforting dish that combines the buttery goodness of croissants with the richness of eggs and cheese. Itโ€™s perfect for brunch parties or holiday mornings. You can make it ahead of time, so itโ€™s ready when you are. Plus, everyone can customize their servings with their favorite toppings. This dish is sure to impress your family and friends while keeping your morning stress-free.

How to Make Overnight Croissant Breakfast Casserole

Ingredients Youโ€™ll Need

4 croissants, torn into pieces
6 large eggs
2 cups milk
1 cup shredded cheese (cheddar or your choice)
1/2 cup cooked beef or cooked sausage, chopped
1/4 cup chopped green onions
Salt and pepper to taste
Butter or cooking spray for greasing

Step-by-Step Directions

  1. Preheat your oven to 350ยฐF (175ยฐC). Grease a baking dish with butter or cooking spray.
  2. In a large bowl, whisk together the eggs and milk. Season with salt and pepper.
  3. Place the torn croissant pieces into the greased baking dish. Add in the chopped beef or sausage, green onions, and shredded cheese.
  4. Pour the egg mixture over the croissants and other ingredients, making sure everything is well combined.
  5. Cover the dish with plastic wrap and refrigerate overnight.
  6. In the morning, remove the cover and bake the casserole for 30-40 minutes or until the top is golden and set.
  7. Let it cool slightly before serving. Enjoy your festive brunch!

How to Serve Overnight Croissant Breakfast Casserole

Serve the casserole warm, straight from the oven. You can add some fresh fruit or a light salad on the side for a balanced meal. Top each serving with extra green onions or a sprinkle of hot sauce for an extra kick.

How to Store Overnight Croissant Breakfast Casserole

Store any leftovers in an airtight container in the refrigerator. It will stay fresh for up to three days. You can reheat portions in the microwave or in the oven until warmed through.

Tips for the Best Overnight Croissant Breakfast Casserole

Make sure to use stale croissants for the best texture. This allows them to soak up the egg mixture. You can also add different vegetables or switch up the meat for your favorite flavors. Experiment with different cheeses for unique tastes.

Recipe Variations

You can easily change up this casserole. Try adding spinach, mushrooms, or bell peppers for extra veggies. Use different meats like beef n or turkey sausage, or go vegetarian by omitting meat altogether.

Frequently Asked Questions (FAQs)

Can I use other types of bread?
Yes, you can use other types of bread like brioche or challah if you prefer. Just make sure to adjust the amount of milk and eggs if needed.

Can I freeze this casserole?
Yes, you can freeze the unbaked casserole. Just cover it tightly and store it in the freezer. Thaw it overnight in the refrigerator before baking.

Is this casserole suitable for a crowd?
Absolutely! This recipe can easily be doubled or tripled for larger gatherings. Just use a bigger baking dish and adjust the cooking time if needed.

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Overnight Croissant Breakfast Casserole

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A warm and delightful breakfast casserole with flaky croissants, eggs, and cheese, perfect for meal prep and serving a crowd.

  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Total Time: 45 minutes
  • Yield: 6 servings 1x
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian (if meat is omitted)

Ingredients

Scale
  • 4 croissants, torn into pieces
  • 6 large eggs
  • 2 cups milk
  • 1 cup shredded cheese (cheddar or your choice)
  • 1/2 cup cooked beef or cooked sausage, chopped
  • 1/4 cup chopped green onions
  • Salt and pepper to taste
  • Butter or cooking spray for greasing

Instructions

  1. Preheat your oven to 350ยฐF (175ยฐC). Grease a baking dish with butter or cooking spray.
  2. In a large bowl, whisk together the eggs and milk. Season with salt and pepper.
  3. Place the torn croissant pieces into the greased baking dish. Add in the chopped beef or sausage, green onions, and shredded cheese.
  4. Pour the egg mixture over the croissants and other ingredients, making sure everything is well combined.
  5. Cover the dish with plastic wrap and refrigerate overnight.
  6. In the morning, remove the cover and bake the casserole for 30-40 minutes or until the top is golden and set.
  7. Let it cool slightly before serving. Enjoy your festive brunch!

Notes

Use stale croissants for the best texture. You can customize with different vegetables and cheeses as desired.

Nutrition

  • Serving Size: 1 serving
  • Calories: 400
  • Sugar: 6g
  • Sodium: 600mg
  • Fat: 24g
  • Saturated Fat: 11g
  • Unsaturated Fat: 9g
  • Trans Fat: 0g
  • Carbohydrates: 30g
  • Fiber: 2g
  • Protein: 18g
  • Cholesterol: 250mg

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