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Stepping up our holiday breakfasts with this Ham and Cheese Croissant Bake. Buttery croissants, Brie cheese, prosciutto, and mushrooms, all tossed together in a mustard โcreamโ sauce, then baked to golden, cheesy perfection. This a cross between your favorite ham and cheese croissant sandwich and your momโs old school Christmas morning strata. It feels extra fancy but is actually SO EASY, and of course, SO DELICIOUS. Bonus, itโs just as good for breakfast as it is dinner. And the best part? You can prep this croissant bake in advance, then bake it off just before youโre ready to serve. Perfect for holiday entertaining!


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Ingredients
- Roughly torn, day-old croissantsย
- Salted butterย
- Extra virgin olive oilย
- Mixed mushroomsย
- Kosher salt and pepperย
- Garlicย
- Fresh chopped thymeย
- Heavy creamย
- Whole milkย
- Eggsย
- Dijon mustardย
- Cayenne pepperย
- Prosciuttoย
- Brie cheeseย
- Swiss or fontina cheeseย
- Everything bagel spiceย
There are only two days left until Thanksgiving and oddly I am more prepared than ever. Why? Because Iโm not cooking! Well, I mean, I will be cooking, but this year I wonโt have our usual huge crowd. My family will be a bit split up (which is the weirdest thing). This is the first year inโฆeverโฆthat I wonโt be with them. Itโs also the first time in many years that I will not be roasting a turkey on Thanksgiving Day. Itโs OK though, Iโve already roasted two whole turkeys this month alone. Plus, thereโs a very good chance I will do so again on Christmas. So, donโt you guys worry, I am not bummed.
All that said, while my family will be in Tahoe over Thanksgiving, almost everyone is currently here in Colorado now. My brothers have taken over my parentโs house. Theyโve been making their way over to the HBH studio barnโฆjust down the hill a little wayโฆand requesting food and drink at least once a day. Itโs the busiest time of year for us right now, but I just canโt say no to them.
Since everyone is here, Iโve been looking to make more casseroles and bakes that feed our large crew and are easy to throw together. Iโve already made this one pot spicy pesto bake rigatoni twice in the last week. To switch things up a bit, I wanted to give the classic ham and cheese sandwich a fresh new update.
Which brings me to this cheesy bake thatโs great for everything from breakfast to dinner. Itโs rich, indulgent, and perfect for feeding friends and family.

With nine plus people in my family, I rely heavily on my Pyrex Deep baking dishes throughout the holidays. I love the added depth these dishes provide. I can conveniently layer food in them and easily feed the familyโฆand friends. The new Pyrex Deep are the deepest glass baking dishes out there. They hold up to 50% more than any current glass bakeware. Obviously, theyโre perfect for things like pasta bakes and lasagna. But I also love using them for pretty layered dips and desserts.
You can find Pyrex Deep baking dishes at Walmart and Pyrexhome.com.

Here is how to make this ham and cheese croissant bake.
The process is pretty simple. Toast some store-bought croissants in the oven to add a little crispness to them.
While thatโs happening, make the mustard cream sauce, which is a simple mix of mustard, cream, eggs, and herbs. When the croissants are toasted, toss them in the sauce along with caramelized mushrooms, prosciutto (or deli ham), and cheese. Layer the croissant and cream in the Pyrex Deep, then bake.
Simple right? Yes, and SO GOOD.
But hold on, thereโs moreโฆ

The two ingredients you need mostโฆ
Creamy Brie cheese and just a touch of everything bagel spice.
First, the brie. Itโs not traditional in a ham and cheese sandwich, but I also have Brie in my fridge this time of year and love using it in my recipes to make them feel just a bit more special. Of course, you can really use any cheese you love. But weโve found the Brie to really take this simple bake from good to incredibly delicious.
Second, everything bagel spice. No, you donโt NEED this, BUT it adds so much. You can mix up your spice blend or pick up some from Trader Joeโs, Whole Foods, or order via Amazon.

This is a great dish to prepare ahead of time for holiday guests. We love enjoying this for breakfast, but itโs also great as a dinner too. Either way, it will be loved by everyone.
I mean, itโs pretty hard not to enjoy buttery croissants, cheese, and ham all baked together. It has the perfect marriage of French flavors. If you donโt already have your Black Friday brunch recipe lined up, add this to the menu. Chances are youโll have all the ingredients in the kitchen anyway. This dish is also a great way to use up anything leftover from Thanksgiving Dayโฆjust throw it in!


If you make this ham and cheese croissant bake, be sure to leave a comment and/or give this recipe a rating! Above all, I love to hear from you guys and always do my best to respond to each and every comment. And of course, if you do make this recipe, donโt forget to tag me on Instagram! Looking through the photos of recipes you all have made is my favorite!
Ham and Cheese Croissant Bake

Ingredientsย
- 12 cups (about 12-16 croissants) roughly torn, day-old croissants
- 2 tablespoons salted butter, thinly sliced
- 2 tablespoons extra virgin olive oil
- 2 cups mixed mushrooms, roughly chopped
- kosher salt and pepper
- 2 cloves garlic, minced or grated
- 2 tablespoons fresh chopped thyme, (or 2 teaspoons dried thyme)
- 1 cup heavy cream
- 1 cup whole milk
- 3 large eggs, beaten
- 2 rounded tablespoons dijon mustard
- 1/2 teaspoon cayenne pepper, using more or less to our taste
- 3 ounces deli ham or prosciutto, torn
- 4 ounces creamy Brie cheese, cubed
- 1/2 cup shredded Swiss or fontina cheese
- 2 tablespoons everything bagel spice, (optional)
Instructionsย
- 1. Preheat the oven to 350 degrees F. Grease a 9 x 13-inch Pyrex Deep baking dish.2. Arrange the torn croissants in the baking dish and lay 2 tablespoons of thinly sliced butter over the croissants.ย Transfer to the oven and bake 5-8 minutes, until the croissants are lightly toasted.3. Meanwhile, heat the olive oil In a large skillet over medium heat. When the oil shimmers, add the mushrooms, season with salt and pepper. Cook undisturbed for 5 minutes or until golden, stir and continue cooking until the mushrooms have caramelized, 3-5 minutes. Add the garlic and thyme, cook an additional minute. Remove from the heat and set aside.4. In a large bowl, whisk together the cream, milk, eggs, mustard, cayenne, and a pinch each of salt and pepper. Add the toasted croissants, mushrooms, ham, and Brie cheese, gently toss to combine. Pour the mixture back into the casserole dish. Top evenly with Swiss cheese and sprinkle with everything spice.5. Cover the dish with foil and bake for 30 minutes. Remove the foil, then continue baking for another 10-15 minutes or until the croissants are golden on top. Serve warm.
Notes
Nutrition
Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.
Did you make this recipe? Please rate & comment below.

























made this dish yesterday and it was a BIG hit!. i used whatever i had in my fridge at the time which was hot salami, fetta, mozzarella and ever cherry tomatoes. I didn’t have the bagel spice and didn’t notice it missing at all as this dish is so flavoursome already. I have already been asked to make it again! THANKYOU!
Hey Samantha,
Love to hear this! Thanks a lot for making this recipe and taking the time to comment. Have a wonderful Sunday!
Hi! If I make ahead and freeze it, will it be soggy/ do I need to change how much time we need to bake it for?
Hi Alex,
That will be perfectly fine for you to do! I hope you love this recipe, let me know how it turns out for you!
Hi, do you have any suggestions to make this a vegetarian dish by making a substitution for the prosciutto? Thank you!
Hi there,
I would just omit the prosciutto, no big deal:)
I hope you love this recipe, please let me know if you give it a try!
Hi
Can I freeze this
And also can I do it in individuals?
Hi Mary,
Yes, you could freeze this and also make smaller portions. Please let me know if you have any other questions! xx
Hi! When freezing to make ahead, do you fully assemble and bake and then freeze? Or freeze not yet baked?
Hi Hannah,
You can wait to bake and then just bake from frozen. I hope you love this recipe!
This is delicious! I made it for Mothers Day and everyone enjoyed it . An โupgradedโ breakfast casserole . I increased to 6 eggs and it turned out perfect .
Hey Ann,
Happy Monday! I appreciate you trying this recipe and your feedback, love to hear it turned out well! xx
Can this be fully assembled overnight and baked the next day?
Hey Anna,
Totally, that will work nicely for you! I hope you love this recipe, please let me know if you give it a try!
Do I have to use the mushrooms?
Hi Susy,
You can omit the mushrooms or use another veggie that you enjoy. Please let me know if you have any other questions! xx
Thank you! Picky people in this family. May just have to omit the mushrooms. Making this for Easter brunch!
I made this a couple weeks ago, I cut everything in half because there’s only 2 of us. Next time I’m going all in, this was so good. I have a question…..
*Could I use fresh spinach and is there a change in cooking if I do?
Hi Kimmi,
Happy Friday!! Thanks a lot for giving this recipe a try, so glad to hear it turned out well for you! Sure, if you want to use fresh spinach I would just sautรฉ it down first and drain any liquid. XxT