Overnight Mixed Berry Croissant Breakfast Casserole

Name: Overnight Mixed Berry Croissant Breakfast Casserole
Prep time: 20 min
Cook time: 9 h 20 min
Total time: 9 h 40 min
Yield: 12
Cuisine: American
Ingredients: 1 cup powdered sugar plus more for garnish; 16 ounces softened cream cheese divided; 2 teaspoons grated lemon zest plus 1½ tablespoons fresh lemon juice, divided; 1 tablespoon plus 1 teaspoon vanilla extract divided; 2 cups mixed berries divided; ⅔ cup granulated sugar; 2 cups half-and-half; 4 large eggs lightly beaten; ½ teaspoon kosher salt; 14 mini croissants*; toasted sliced almonds for topping; maple syrup for serving

By:

Sarah

Published:

July 5, 2026

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Overnight Mixed Berry Croissant Breakfast Casserole is the perfect way to kickstart a lazy weekend morning. It combines the flaky, buttery goodness of croissants with the delightful sweetness of mixed berries and a creamy custard, creating a dish that will have everyone at the table smiling. Imagine slicing through a golden-brown topping to reveal layers of luscious cream cheese and juicy berries nestled between soft croissant pieces, all infused with the bright zing of lemon. It’s a breakfast that feels indulgent but is surprisingly easy to pull together.

I first stumbled upon this recipe during a brunch gathering with friends, where we wanted something special without spending the entire morning in the kitchen. Not only is this casserole a crowd-pleaser, but it’s also incredibly forgiving – you can prep it the night before and let it work its magic in the refrigerator while you get your beauty sleep. When everyone gathers around in the morning, they’ve got a beautiful, aromatic casserole that’s ready to share. Who wouldn’t want to try making this Overnight Mixed Berry Croissant Breakfast Casserole?

Why You’ll Love This Recipe

Simple & Quick: You can prep this delightful casserole in just 20 minutes!
Irresistible Flavor: The combination of cream cheese, fresh berries, and buttery croissants will have your taste buds dancing.
Eye-Catching Appeal: This dish looks gorgeous when baked, perfect for impressing guests or brightening up your breakfast table.
Flexible Serving: Serve it for breakfast, brunch, or even dessert with a drizzle of maple syrup.
Diet-Friendly Options: While this version is decadent, you can easily make it gluten-free or dairy-free with the right substitutes.

Ingredients You’ll Need

1 cup powdered sugar: Adds sweetness and a touch of creaminess; can substitute with a sugar-free alternative.
16 ounces softened cream cheese: Provides rich texture; ensure it’s softened for smooth mixing.
2 teaspoons grated lemon zest: Brightens flavors; try lime zest for a different twist.
1½ tablespoons fresh lemon juice: Enhances the overall flavor; look for fresh juice for the best taste.
1 tablespoon plus 1 teaspoon vanilla extract: Adds warmth and depth; you can use almond extract for a unique flavor profile.
2 cups mixed berries: A mix of strawberries, blueberries, and raspberries adds color and natural sweetness; frozen berries work too.
⅔ cup granulated sugar: Balances tartness; you can reduce this if you prefer less sweetness.
2 cups half-and-half: Brings richness to the custard; can substitute with whole milk for a lighter version.
4 large eggs: Binds the dish together; room temperature eggs blend better.
½ teaspoon kosher salt: Enhances all flavors; can use sea salt as an alternative.
14 mini croissants: These are the star of the dish; if unavailable, regular croissants can be used—just slice them appropriately.
Toasted sliced almonds: Provide a lovely crunch on top; feel free to skip them if nut-free.
Maple syrup: To serve alongside; it pairs beautifully with the casserole’s creaminess.

How to Make Overnight Mixed Berry Croissant Breakfast Casserole

Make the Berry Cream Cheese Mixture: In a large mixing bowl, combine 1 cup powdered sugar with 8 ounces of the softened cream cheese. Add 2 teaspoons grated lemon zest, ½ tablespoon lemon juice, and 1 teaspoon vanilla extract. Mix until smooth and creamy. Gently fold in about half of the mixed berries, pressing some slightly to release their juices. Set aside.
Prepare the Custard: In another bowl, blend the remaining 8 ounces of cream cheese with ⅔ cup granulated sugar until smooth. Slowly whisk in 2 cups half-and-half. Then add in 4 lightly beaten large eggs, ½ teaspoon kosher salt, the remaining 1 tablespoon lemon juice, and remaining 1 teaspoon vanilla extract. Whisk until fully combined and silky.
Layer the Croissants: Slice the 14 mini croissants in half horizontally and arrange the bottom halves in a greased 9×13-inch baking dish. Spoon the berry cream cheese mixture over each base, then cap them with the croissant tops, making little sandwiches.
Soak the Croissants: Pour the custard mixture evenly over the croissants, ensuring each piece is well-coated. Tear any leftover croissant pieces and tuck them into any gaps. Scatter the remaining berries on top.
Refrigerate Overnight: Cover the dish and refrigerate it for at least eight hours, or overnight. This allows the croissants to absorb the delicious custard.
Bake the Casserole: When you’re ready to enjoy it, preheat your oven to 325°F. Remove the dish from the refrigerator and let it sit at room temperature while the oven heats. Cover with foil and bake for about 30 minutes. Then, remove the foil and continue baking for another 25 to 30 minutes, until the top is lightly golden and the center is set, bubbling slightly around the edges.
Serve: Finish it off with a sprinkle of toasted sliced almonds and a dusting of additional powdered sugar. Serve while warm, with a side of maple syrup.

Storing & Reheating

For leftovers, keep the casserole tightly covered in the refrigerator for up to 3 days. If you plan to save it for longer, consider freezing it for up to 3 months. To reheat, remove from the fridge and let it sit for about 20 minutes; then preheat your oven to 350°F and bake until warmed through, about 15 to 20 minutes. Keep in mind that the texture might not be as fluffy as when freshly baked, but a quick reheat will bring back some warmth and comfort.

Chef’s Helpful Tips

Be careful not to overmix the cream cheese mixture; just enough to incorporate will ensure a creamy texture.
Always allow your croissants to soak in the custard mixture long enough; this prevents them from being soggy and ensures they are flavorful.
If you have time, let the casserole sit out for 30 minutes before baking; this helps in even cooking.
For a lighter option, consider using a combination of half-and-half and Greek yogurt to replace some of the creaminess.
Experiment with different berries or even chocolate chips for a fun twist that will keep everyone coming back for seconds!

This Overnight Mixed Berry Croissant Breakfast Casserole brings together ease and elegance, promising to make any breakfast feel special. The layers of sweet berries, creamy filling, and flaky croissants create the ultimate treat that feels just as good as you’d find in your favorite café. Don’t hesitate to get creative with your favorite fruits or toppings!

Recipe FAQs

Can I use frozen berries instead of fresh?

Absolutely! Frozen mixed berries work wonderfully in this casserole. Just be sure to let them thaw and drain any excess juice before adding them to the mixture, as this will prevent the casserole from becoming too soggy.

How can I make this casserole gluten-free?

You can easily swap out the mini croissants with gluten-free alternatives available at many grocery stores. There are even delicious gluten-free croissant options that you can use that won’t compromise on texture or flavor!

Can I prep this casserole in advance?

Yes, that’s the beauty of this recipe! You can assemble the casserole up to 24 hours in advance, refrigerate it, and then simply pop it in the oven when you’re ready to bake.

What can I serve with this breakfast casserole?

Pair it with fresh fruit, yogurt, or a light salad. A splash of freshly brewed coffee or tea makes for a perfect brunch complement, making for a delightful gathering around the table.