This Croissant Breakfast Sandwich with Brie, Bacon, and Spicy Honey Mustard is one of those combinations that just works every single time. The creamy, melty brie pairs beautifully with salty bacon and soft scrambled eggs, all wrapped up in a buttery, flaky croissant. Add a homemade spicy honey mustard sauce and you have a breakfast sandwich worth waking up for.

The spicy honey mustard is what really makes this breakfast sandwich special. It is made with simple pantry staples and takes about two minutes to mix together, but the flavor is anything but basic. I created this sandwich because I wanted something that felt like a real treat without a long list of complicated steps. If you love a hearty breakfast egg croissant moment, my caprese croissant breakfast sandwich is another one worth trying.

Breakfast croissant sandwich with bacon, egg, brie and spicy honey mustard on cutting board.

Why You’ll Love This Recipe

Ready in under 20 minutes: From mixing the honey mustard to the final assembly, this sandwich comes together fast for both busy mornings and slower weekends.

Loaded with flavor: Melty brie, crispy bacon, fluffy eggs, and a bold spicy honey mustard create layers of flavor in every single bite.

Great for feeding a crowd: This recipe makes four sandwiches, making it a natural fit for weekend brunch when you are feeding the whole family.

What I Love:

What I Love: The homemade spicy honey mustard sauce is a keeper. Once you make it, you will find yourself reaching for it all week long on everything from wraps to eggs to other sandwiches.

Ingredients for the breakfast croissant sandwiches.

Ingredient Notes and Substitutions

Croissants: Store-bought bakery croissants are perfect to save time. Look for larger croissants that can hold up to generous fillings without falling apart.

Brie Cheese: Brie melts into something incredibly creamy and rich, which is exactly what you want in a breakfast egg croissant like this. Camembert works as a swap, and gouda is a milder option in a pinch that may be more kid friendly for picky eaters.

Bacon: Cook your bacon however works best for you . Stovetop, oven, or even the microwave in a pinch. You want it crispy enough to hold up inside the sandwich. You can use prosciutto in place of the bacon.

Eggs: Two eggs per sandwich works the best.

Milk: Just a small splash whisked into the eggs makes the eggs light and fluffy. Any percent milk works fine here.

Butter: Used to cook the scrambled eggs. It adds flavor and keeps the eggs from sticking. You could use a cooking oil, such as avocado oil, instead of butter if needed.

Olive Oil: A drizzle over the cut croissant before toasting helps create that golden, slightly crisp exterior.

Spicy Honey Mustard: This sauces comes together with mustard, honey, mayo, cayenne, paprika, a splash of vinegar, and salt and pepper. Start with 1/4 teaspoon of cayenne and work your way up based on personal taste. Store-bought spicy honey mustard works, but the homemade version only takes two minutes and tastes so much better.

Homemade spicy honey mustard in a bowl next to a croissant.

How to Make a Croissant Breakfast Sandwich: Step-by-Step Instructions

Make the spicy honey mustard first by combining the mustard, honey, mayo, cayenne pepper, paprika, vinegar, salt, and pepper in a small bowl. Stir until smooth. Taste and adjust the cayenne to your liking. Set aside.
Cut each croissant open and drizzle the cut sides with a little olive oil. Heat a skillet over medium heat and place the croissants cut-side down. Toast until golden brown. Remove and set aside.
In the same skillet, melt the butter over medium-low heat. Whisk the eggs with the milk. Add to the skillet and gently scramble, stirring slowly until just cooked through and still soft. Remove from heat and season with salt and pepper to taste.
Spread the spicy honey mustard generously over each toasted croissant. Divide the scrambled eggs evenly across the four sandwiches, then layer on the brie cheese slices.
Place the open-faced sandwiches into the air fryer at 350 degrees for two minutes or under the broiler in the oven for one minute, just until the brie is fully melted and gooey.
Lay two slices of crispy bacon on each sandwich, close them up, and enjoy right away.

Sara’s Tip

Do not skip toasting the croissants. It only takes a couple of extra minutes but makes a real difference. A toasted croissant holds up to all the fillings without going soggy, and that golden crust adds so much to the overall texture of the sandwich.

Breakfast croissant sandwich open faced, showing the spicy honey mustard, brie cheese, scrambled eggs and bacon.

Recipe FAQs

Can I make the spicy honey mustard ahead of time?

Yes, and I actually recommend it. The flavors get even better after sitting for a bit. Make it up to a week ahead and store it in a sealed jar in the fridge. It is great to have ready for other recipes, like chicken nuggets or other sandwiches.

What is the best way to melt the brie?

An air fryer at 350 degrees F for one to two minutes works really well and gets the brie melty without drying out the eggs underneath. If using the oven, a quick minute or two under the broiler does the job. Just keep a close eye on it.

Can I use a different bread?

A brioche bun or ciabatta roll both work if you do not have croissants on hand. That said, the buttery, flaky texture of a croissant is a big part of what makes this sandwich feel special, so it is worth using when you can.

Can I swap or add any fillings?

Absolutely. These sandwiches are really flexible. A handful of arugula adds freshness, prosciutto is a great swap for the bacon, and sliced tomato fits right in.

Can I scale this up for a crowd?

Yes! Cook the eggs and bacon in bigger batches and set up an assembly station. Toast the croissants on a sheet pan in the oven to keep things efficient. Melt the brie in the air fryer or under the broiler in the oven to order so everything stays warm and gooey.

How do I store leftovers?

This sandwich is best eaten fresh. If you have leftover components, store the scrambled eggs, bacon, and honey mustard separately in airtight containers in the fridge for up to two days and build fresh sandwiches when ready to eat.

Looking for even more hearty breakfast ideas? I have plenty of savory breakfast recipes to keep your mornings from getting boring!

If you give this croissant breakfast sandwich a try, let me know your thoughts in the comments below!

And be sure to tag me on Instagram so I can see your creations.

From my kitchen to yours, happy cooking! I hope you love this breakfast sandwich as much as we do!