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Ever scrambled to find Breakfast Ideas For A Crowd when you can barely remember your own name before coffee? I’ve been there, and honestly, nothing saves the day like a breakfast casserole you assemble the night before. Imagine buttery, flaky croissants soaking up a rich egg custard, studded with melty cheese and your favorite mix-ins. FYI, this Overnight Croissant Breakfast Bake isn’t just another recipe—it’s my go-to when I want an Easy Breakfast Idea that feels fancy without the fuss.
I first tested this for a Brunch Potluck, expecting the usual cheese-and-bacon casserole. Instead, I grabbed croissants from my Breakfast Basket and thought, “Why not?” The result? A Breakfast Casserole Make Ahead masterpiece that even my picky cousin couldn’t resist. IMO, it outshines most Egg Casserole Recipes I’ve tried, plus it’s way more fun than your basic Tortilla Quiche Bake or Egg Frittata.
Whether you’re aiming for a Healthy Breakfast Casserole by swapping in turkey sausage and veggies, or embracing full-blown decadence with an Easy Tater Tot Casserole vibe, this recipe flexes to your mood. Ready to ditch morning stress and wake up to a crowd-pleasing, Savory Breakfast heaven? Let’s dive into the magic of an Overnight Breakfast Casserole With Hashbrowns twist—croissants edition! 🙂
Ingredients
- 6 large day-old croissants, torn into 2-inch pieces
- 8 large eggs, room temperature
- 2 cups whole milk (or half & half for extra creaminess)
- 1 cup shredded cheddar cheese (sharp or mild)
- ½ cup grated Parmesan
- 1 cup cooked bacon or breakfast sausage, chopped
- 1 small bell pepper, diced (any color)
- ½ small onion, finely chopped
- 2 cloves garlic, minced
- 1 tsp Dijon mustard
- 1 tsp dried oregano or Italian seasoning
- ½ tsp salt (adjust to taste)
- ¼ tsp freshly ground black pepper
- 2 tbsp chopped fresh chives or parsley (optional garnish)
Instructions
- Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish or line with parchment for easy cleanup.
- Spread the croissant pieces evenly in the prepared dish. Make sure they fill every corner—no lonely croissant left behind.
- In a large bowl, whisk together eggs, milk, Dijon mustard, oregano, salt, and pepper until frothy and well combined.
- Sprinkle half of the cheddar and Parmesan over the croissants. Even coverage = melty goodness in every bite.
- Layer the cooked bacon (or sausage), bell pepper, onion, and garlic evenly on top of the cheese.
- Pour the egg mixture slowly over everything, pressing down gently so the croissants soak it all up.
- Sprinkle the remaining cheddar and Parmesan on top. If you want an extra crispy edge, add a light dusting of paprika.
- Cover the dish tightly with foil and refrigerate overnight (8–12 hours). This is your Breakfast Casserole Overnight magic—no morning prep required.
- The next morning, remove foil and bake for 35–40 minutes, or until the center sets and the top turns golden brown.
- Let it rest for 5 minutes, then garnish with fresh chives or parsley. Slice, serve, and watch everyone’s faces light up!
Variations
Want to switch things up? Here are a few Breakfast Casserole Ideas that keep this base recipe exciting:
– For a Healthy Breakfast Casserole, swap half the cheese for crumbled feta, use egg whites or a flax egg blend, and toss in chopped spinach or kale.
– Craving a Southwest kick? Stir in a can of diced green chiles, substitute Pepper Jack cheese, and top with fresh salsa and avocado after baking.
– Love the idea of Mini Quiche Recipes? Divide the mixture into a greased muffin tin for individual servings—perfect for lunchboxes or a Brunch Potluck.
– Feeling nostalgic for potato-forward comfort? Fold in 1½ cups of hashbrowns (shredded or diced) for an Easy Breakfast Casserole With Hashbrowns twist that rivals any Overnight Breakfast Casserole With Hashbrowns.
– Going global? Add a teaspoon of curry powder, swap sausage for diced chicken, and finish with a sprinkle of cilantro for an Indian-inspired spin on your Omlet Breakfast Ideas.
Serving & Tips
Serve this croissant bake warm, straight from the oven. It pairs beautifully with a crisp green salad, fresh fruit platter, or even a side of roasted veggies—think of it as a Brunch Casserole main event. Store leftovers covered in the fridge for up to 4 days; reheat slices in the microwave or oven until just warmed through. To freeze, slice cooled casserole, wrap individual portions in foil, and stash them in a freezer bag for up to 2 months. Pro tip: let frozen slices thaw in the fridge overnight before reheating. If you’re building a Breakfast Basket for a guest or gift, include mini jars of homemade jam, fresh berries, and cute little herb sprigs for a cozy, seasonal touch.
Final Thoughts
Honestly, I can’t recommend this Overnight Croissant Breakfast Bake enough. It lives up to my obsession with Breakfast Casserole Recipes by being totally customizable, super forgiving, and downright addictive. The croissants soak up all that savory custard, giving you buttery pockets in every bite—no soggy middles here. Whether you’re planning a lazy weekend brunch, need a crowd-pleasing breakfast, or just want to feel like a kitchen rockstar without breaking a sweat, this recipe’s got your back. Trust me, you’ll wake up excited to bake it, and even more excited to eat it. Now go on—gather those croissants and give your morning routine the upgrade it deserves!
Overnight Croissant Breakfast Bake
Ingredients
Equipment
Method
- Grease a 9×13-inch baking dish with butter or non-stick spray.
- Scatter the torn croissant pieces evenly in the dish.
- In a large bowl, whisk together eggs, milk, and Dijon mustard (if using) until fully combined.
- Stir in salt, pepper, and Italian herbs or parsley.
- Layer half of the shredded cheese on the croissants. Add ham or bacon and spinach or peppers. Top with remaining cheese.
- Pour the egg mixture evenly over the dish. Press gently to soak the croissants.
- Cover tightly with foil or plastic wrap and refrigerate overnight (or at least 4 hours).
- Preheat oven to 350°F (175°C). Uncover and bake for 35–40 minutes, until golden and set.
- Let rest 5–10 minutes before slicing and serving.
Nutrition
Notes
Tried this recipe?
Let us know how it was!FAQs
Can I use stale bread instead of croissants?
Absolutely! Day-old brioche, challah, or even standard white bread work great. Croissants just add extra flakiness and richness, but any sturdy bread holds up well in a breakfast casserole.
Is there a dairy-free version?
Yes—use almond or oat milk and swap cheeses for dairy-free alternatives. You can also blend silken tofu into your egg mixture for a creamy, plant-based custard.
How far ahead can I make this casserole?
You can prep it up to 24 hours in advance. Just keep it covered and refrigerated. If you prep too early, the croissants might turn overly soggy, so try to stick to that 8–12 hour window.
Can I freeze leftover casserole?
Definitely. Cut into single servings, wrap in foil, and pop in a freezer bag. Thaw overnight in the fridge and reheat in the oven at 325°F for 10–15 minutes or until warmed through.
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