There’s something magical about waking up to a breakfast that tastes like dessert but fills you up like a proper meal. That’s exactly what happened the first time I served this Monte Cristo casserole at a family brunch—the kids were thrilled by the powdered sugar dusting, while the adults appreciated the sophisticated blend of savory ham and tangy raspberry preserves. This dish transforms the beloved deli sandwich into an easy-to-share casserole that can be prepped the night before, making it perfect for lazy weekend mornings or special holiday gatherings when you’d rather spend time with loved ones than hovering over the stove.
Why You’ll Love This Recipe
This Monte Cristo breakfast casserole hits that perfect sweet-and-savory balance that makes it stand out from typical egg bakes. The buttery croissants soak up a custard mixture overnight, creating a texture that’s part French toast, part bread pudding. You can assemble everything the evening before and simply bake it in the morning, which means less stress on busy holiday mornings like Easter or Mother’s Day. It’s kid-approved thanks to the hint of sweetness from raspberry jam, yet sophisticated enough to impress brunch guests. Plus, it feeds a crowd in one pan—no need to stand at the griddle making individual sandwiches.
“This Monte Cristo casserole is absolutely delicious! The combination of ham, cheese, and raspberry preserves works so well together. I made it for Mother’s Day brunch and everyone asked for the recipe. The croissants give it such a rich, buttery flavor.”
How to Make Monte Cristo Breakfast Casserole
This recipe follows a simple make-ahead formula that takes the pressure off morning cooking. You’ll start by building mini sandwiches with croissants, raspberry preserves, ham, and Swiss cheese. These sandwiches get arranged in a baking dish, then covered with a savory custard made from eggs, half-and-half, and a touch of Dijon mustard. The casserole needs at least an hour to chill so the bread absorbs all that eggy goodness, though you can prep it up to two days ahead. When you’re ready to bake, the covered casserole goes into the oven first to cook through gently, then you remove the foil to let the top turn golden brown. A brief rest after baking helps everything set, then it’s ready to serve with a dusting of powdered sugar.
What You’ll Need
For the sandwiches:
- 6 large croissants (brioche or French bread also work)
- 3 tablespoons raspberry preserves
- 16 ounces deli-sliced ham (Virginia ham adds nice savory depth)
- 6 slices Swiss cheese (Gruyère makes a tasty substitute)
For the custard:
- 7 eggs
- 2 cups half-and-half
- 1½ tablespoons Dijon mustard (adds a subtle tangy note)
For serving:
- Powdered sugar for dusting
- Maple syrup (optional)
Step-by-Step Instructions
- Prep your pan: Grease a square baking dish for thicker slices or a 9×13-inch pan for faster cooking.
- Build the sandwiches: Slice each croissant in half horizontally. Spread raspberry preserves on the bottom half, then layer with ham and a slice of Swiss cheese. Top with the other croissant half.
- Arrange in the dish: Cut each sandwich in half and fit them snugly into your greased baking dish.
- Make the custard: Whisk together eggs, half-and-half, and Dijon mustard in a bowl until well combined.
- Soak the bread: Pour the custard mixture evenly over the sandwiches. Gently press down so the croissants absorb the liquid.
- Chill: Cover with plastic wrap and refrigerate for at least 1 hour, or up to 2 days.
- Bake covered: Remove from the fridge while you preheat the oven to 375°F. Remove plastic wrap, cover with foil, and bake for 40 minutes (30 minutes if using a 9×13-inch pan).
- Finish uncovered: Remove foil and continue baking for 20 more minutes until the center is set and the top is golden.
- Rest and serve: Let the casserole sit for 10 minutes, then dust with powdered sugar before slicing.
Best Ways to Enjoy It
Serve this casserole warm with a generous dusting of powdered sugar for that classic Monte Cristo experience. If you want to lean into the French toast vibes, drizzle warm maple syrup over individual portions. For a complete brunch spread, pair it with fresh fruit salad, crispy bacon strips, or a simple arugula salad dressed with lemon vinaigrette to cut through the richness. The sweet-savory combination also works beautifully with roasted asparagus or a tomato and cucumber salad. For beverages, orange juice, coffee, or mimosas are all excellent choices.
Storage and Reheating Tips
Store leftover casserole covered or in an airtight container in the refrigerator for up to 5 days. Individual portions reheat beautifully in the microwave—about 1-2 minutes depending on your microwave’s power. For larger portions, reheat covered in a 350°F oven until warmed through. If you’ve made this ahead and want to freeze it, you have two options: freeze the already-baked casserole after it’s completely cooled (wrap tightly and freeze for up to 3 months), or freeze the unbaked assembled casserole (wrap in plastic then foil). Thaw completely in the refrigerator before reheating a cooked casserole or baking an uncooked one according to the original directions.
Helpful Cooking Tips
- Choose quality bread: Croissants create the richest flavor, but day-old brioche or French bread work well and cost less.
- Press gently: After pouring the custard, lightly press the bread down to help it soak up the liquid, but don’t squash it completely.
- Check doneness: The center should be set and not jiggly when you shake the pan. If the top browns too quickly, tent with foil.
- Rest before cutting: That 10-minute wait helps the casserole firm up for cleaner slices.
- Customize the mustard: If you’re not a mustard fan, you can reduce it to 1 tablespoon or omit it entirely, though it adds nice depth.
Creative Twists
Make it more savory: Skip or reduce the raspberry preserves and add a sprinkle of black pepper or fresh thyme to the custard. You could also add sautéed mushrooms or caramelized onions between the layers.
Sweeter version: Use strawberry or apricot preserves instead of raspberry, and serve with extra jam and whipped cream on the side.
Different proteins: Try turkey instead of ham, or make it vegetarian by using sautéed spinach and mushrooms in place of the meat.
Cheese swaps: Gruyère, fontina, or even a mild cheddar can replace Swiss cheese for different flavor profiles.
Add crunch: Sprinkle chopped pecans or sliced almonds on top before the final uncovered bake for added texture.
Common Questions
Can I use regular milk instead of half-and-half?
Yes, though the casserole will be slightly less rich. Whole milk works best as a substitute, but even 2% milk will work in a pinch.
How long does the casserole need to soak?
At minimum, give it 1 hour for the bread to absorb the custard. Overnight (8-12 hours) is ideal, and you can prep it up to 2 days ahead.
Can I make this dairy-free?
You can substitute the half-and-half with coconut cream or oat milk, and use dairy-free cheese alternatives, though the flavor will differ from the traditional version.
What if I don’t have croissants?
Thick slices of brioche, challah, or French bread work wonderfully. Cut them into sandwich-sized pieces and proceed with the recipe as written.
Is it safe to leave the egg mixture at room temperature?
No, always refrigerate the casserole after adding the egg mixture. Raw eggs should not sit at room temperature for more than 2 hours.
Can I double this recipe for a larger crowd?
Absolutely! Use a larger baking dish or two 9×13-inch pans. You may need to adjust baking time slightly, checking that the center is fully set before removing from the oven.
Print
Monte Cristo Breakfast Casserole
- Total Time: 180 minutes
- Yield: 8 servings
- Diet: Pork
Description
A sweet-and-savory Monte Cristo casserole that combines croissants, ham, Swiss cheese, and raspberry preserves for a delightful brunch dish.
Ingredients
- 6 large croissants
- 3 tablespoons raspberry preserves
- 16 ounces deli-sliced ham
- 6 slices Swiss cheese
- 7 eggs
- 2 cups half-and-half
- 1½ tablespoons Dijon mustard
- Powdered sugar for dusting
- Maple syrup (optional)
Instructions
- Grease a square baking dish or a 9×13-inch pan.
- Slice each croissant in half horizontally and spread raspberry preserves on the bottom half. Layer with ham and a slice of Swiss cheese, then top with the other half.
- Cut each sandwich in half and arrange them snugly in the greased baking dish.
- Whisk together eggs, half-and-half, and Dijon mustard until well combined.
- Pour the custard mixture evenly over the sandwiches and gently press down.
- Cover with plastic wrap and refrigerate for at least 1 hour, or up to 2 days.
- Preheat the oven to 375°F and remove the plastic wrap. Cover the dish with foil and bake for 40 minutes (30 minutes if using a 9×13-inch pan).
- Remove foil and bake for an additional 20 minutes until the center is set and the top is golden.
- Let the casserole rest for 10 minutes before dusting with powdered sugar and slicing to serve.
Notes
Serve warm with powdered sugar and maple syrup. Pair with fresh fruit salad or crispy bacon for a complete brunch spread.
- Prep Time: 120 minutes
- Cook Time: 60 minutes
- Category: Breakfast
- Method: Baking
- Cuisine: American