This Croissant Breakfast Casserole is a lovely way to start your day! It’s packed with fluffy croissants, eggs, cheese, and your favorite breakfast meats. Yum!
What’s great is that you can make it ahead of time. I love popping it in the oven while I enjoy my coffee. It fills my kitchen with a wonderful smell—totally makes waking up early worth it!
Key Ingredients & Substitutions
Croissants: Fresh croissants are fantastic for this casserole, giving a buttery, flaky texture. However, if you’re short on time, you can use store-bought croissant dough or even puff pastry.
Cheese: Cheddar cheese adds a nice sharpness. You can swap it for Swiss, Monterey Jack, or even a vegan cheese for a dairy-free option.
Eggs: While this recipe uses large eggs, you can use medium or extra-large without drastically affecting the outcome. For a lighter option, consider using egg whites or an egg substitute.
Meats: Breakfast sausage or ham is great, but turkey sausage or bacon works well too. If keeping it vegetarian, feel free to skip the meat altogether!
Milk: Whole milk gives richness, but you can opt for skim milk, almond milk, or oat milk for a lighter alternative.
How Can I Ensure My Casserole Turns Out Perfectly?
Getting the right texture and flavor in your casserole takes a few thoughtful steps. Here’s how to do it right:
- **Sauté the Veggies**: Cooking onions and mushrooms beforehand helps release their flavors and moisture. It prevents the casserole from getting soggy.
- **Soaking the Croissants**: Make sure to let the croissant pieces soak in the egg mixture. Pressing down on them gently will help absorb the flavors.
- **Baking Time**: Keep an eye on the casserole as it bakes. The top should be golden brown, and the center should be set but still moist. If it browns too quickly, you can cover it loosely with foil.
- **Let It Rest**: Allow your casserole to cool for about 5 minutes before serving—it will help everything set up nicely.
These tips will help you create a deliciously satisfying croissant breakfast casserole that’s sure to please a crowd!
How to Make a Delicious Croissant Breakfast Casserole
Ingredients You’ll Need:
Main Ingredients:
- 6 large croissants, halved or quartered depending on size
- 8 large eggs
- 2 cups whole milk or half-and-half
- 1 cup shredded cheddar cheese (or your favorite cheese)
- 1 cup cooked breakfast sausage or ham, diced (optional)
- 1 cup mushrooms, sliced
- 1 small onion, finely diced
- 2 cloves garlic, minced
- 2 tablespoons butter
- 1/4 cup chopped green onions or chives
- Salt and freshly ground black pepper, to taste
- Optional garnish: chopped fresh herbs (parsley, rosemary), sesame seeds
How Much Time Will You Need?
This delicious casserole will take about 15 minutes to prep and 35-45 minutes to bake, for a total time of around 1 hour. It’s perfect for a festive brunch or a comforting breakfast to start your day off right!
Step-by-Step Instructions:
1. Preheat the Oven:
Begin by preheating your oven to 350°F (175°C). This temperature is ideal for ensuring a nice golden top while cooking everything through perfectly. Grease a 9×13-inch baking dish with butter or a nonstick spray to prevent sticking.
2. Sauté the Vegetables:
In a skillet over medium heat, melt the butter. Add the diced onion and sauté until it’s translucent, about 3-4 minutes. Then, add the minced garlic and sliced mushrooms. Continue cooking until the mushrooms are tender and any liquid is mostly evaporated, about 5 minutes. Once done, remove the skillet from the heat.
3. Prepare the Egg Mixture:
In a large mixing bowl, whisk together the eggs, milk, salt, and pepper until everything is well combined. This mixture will bind all the ingredients together and create a deliciously fluffy texture.
4. Layer the Casserole:
Start by spreading half of the croissant pieces evenly across the bottom of your prepared baking dish. Then, sprinkle half of the cooked mushroom and onion mixture, followed by half of the diced sausage or ham (if using), and half of the shredded cheese over the croissants.
5. Soak the Layers:
Now, pour half of the egg mixture over the layered ingredients to help soak the croissants. This will ensure that every bite is creamy and flavorful.
6. Repeat the Layers:
Next, repeat with the remaining croissant pieces, the rest of the mushroom mixture, the meat, and the rest of the cheese. Finally, pour the remaining egg mixture on top. Gently press down on the layers to help the croissants soak up all that delicious egg mixture.
7. Optional Egg Topping:
If you want a beautiful presentation, you can crack a few whole eggs spaced on top of the casserole for added visual appeal and a runny yolk—optional but delightful!
8. Final Touches:
Sprinkle the top with sliced green onions or chives and any garnishes you like, such as sesame seeds or chopped fresh herbs.
9. Bake the Casserole:
Place the casserole in the preheated oven and bake uncovered for 35-45 minutes, or until the top is golden brown and the eggs are fully set. Stay nearby and enjoy the delicious aroma filling your kitchen!
10. Let It Cool:
Once baked, remove the casserole from the oven and let it cool for about 5 minutes before serving. This will make it easier to cut and serve without falling apart.
This hearty and savory croissant breakfast casserole is a real treat, brimming with buttery croissants, savory mushrooms, cheese, and eggs—all topped to perfection. Enjoy it with a side of fresh fruit or a light salad for a complete breakfast experience!
Can I Use Stale Croissants for This Recipe?
Absolutely! Stale croissants work great in this casserole since they will soak up the egg mixture without becoming too mushy. Just make sure to cut them into smaller pieces for even soaking.
Can I Make This Ahead of Time?
Yes, you can prepare the casserole the night before! Just assemble it sans baking and cover it tightly with plastic wrap. Refrigerate overnight, and when you’re ready to bake, let it sit at room temperature for about 30 minutes before popping it in the oven.
How Do I Store Leftovers?
Leftovers can be stored in an airtight container in the fridge for up to 3 days. To reheat, warm individual portions in the microwave or in an oven set to 350°F (175°C) until heated through.
Can I Make It Vegetarian?
Definitely! Simply omit the breakfast meat and consider adding extra veggies like spinach, bell peppers, or zucchini for added flavor and nutrition.
