This Chicken Cordon Bleu Casserole features chunks of sweet ham, tender roasted cauliflower and chicken, baked in a creamy gruyere cheese sauce topped with gooey melted swiss cheese!

Jump to:

• ❤️ Why You'll Love this Chicken Cordon Bleu Casserole
• 🛒 What's in Keto Chicken Cordon Bleu Casserole
• 🔪 How to Make Keto Chicken Cordon Bleu Casserole
• What are the Ingredients to Chicken Cordon Bleu?
• What is the Bleu in Chicken Cordon Bleu?
• What is Cordon Bleu Sauce Made of?
• How Many Calories and Carbs are in Chicken Cordon Bleu?
• Can you Freeze Chicken Cordon Bleu?
• Tips for Making This Gluten Free Chicken Cordon Bleu Casserole
• Substitutions for Low Carb Chicken Cordon Bleu Casserole
• More Keto Casseroles

❤️ Why You'll Love this Chicken Cordon Bleu Casserole

• Sweet baked ham, roasted tender chicken and cauliflower
• Baked in a super creamy gruyere dijon cheese sauce
• Cheesy crust on top
• Perfect way to use up leftover ham
• Hearty and filling
• Family friendly

This low carb casserole has such great flavor and is so easy to make! This is a great dish to make when you have leftover baked ham! You can also use in this Easy Keto Breakfast Casserole or Roasted Cauliflower Ham and Cheese Casserole.

I recently made some improvements to this Keto casserole. The old recipe was great, don't get me wrong, but after making my Chicken Cordon Bleu, I wanted to bring some of those elements to this easy Keto chicken casserole.

So what did I change? I increased the amount of chicken slightly, roasted the cauliflower first to give it more flavor, swapped out the asiago cheese for gruyere, increase the amount of dijon and a few other minor changes. The result is absolutely delicious and I'm convinced you are going to LOVE it!

🛒 What's in Keto Chicken Cordon Bleu Casserole

• Chicken
• Ham
• Cauliflower
• Swiss cheese
• Heavy cream
• Mascarpone cheese (or cream cheese)
• Gruyere cheese (or Swiss)
• Dijon mustard
• Olive oil
• Lemon thyme (or thyme)
• Garlic salt
• Fresh parsley
• Salt
• Ground pepper

*Exact measurements are listed in the recipe card below.

🥣 Recommended Tools

• Saucepan
• Small sheet pan
• 9 x 13 Casserole baking dish
• Mixing bowl
• Whisk

🔪 How to Make Keto Chicken Cordon Bleu Casserole

Preheat oven to 425°F. Add the cauliflower to a mixing bowl and drizzle the olive oil, salt and ground black pepper over the top.

Toss to combine, then pour onto a small baking sheet that's been brushed with olive oil.

Roast in the oven for 15 minutes, tossing halfway through. Remove from the oven, lower the temperature to 375°F and add the cauliflower to a large mixing bowl.

Tip: Roasting the cauliflower before adding it to the casserole helps give it extra flavor.

In the same bowl, add in the chopped ham, shredded chicken, roasted cauliflower, parsley and thyme. Set aside while you make the sauce.

In a saucepan over medium low heat, add in the heavy cream, mascarpone cheese, dijon mustard and garlic salt. Whisk until the mascarpone has melted.

Add in the gruyere cheese and continue to cook just until melted. Remove from the heat and pour the sauce over the top, then toss until everything is well coated.

Tip: If you can't find gruyere cheese, you can use swiss cheese instead. The gruyere has a slightly nutty flavor that is superior to swiss in my opinion, so I highly recommending using it if you can.

Pour the mixture into a 9 x 13 casserole dish that's been brushed with olive oil.

Tip: You can also use an olive oil non-stick spray to help prevent your casserole from sticking.

Then place the swiss cheese slices over the top.

Tip: I used baby swiss cheese because I prefer it to regular swiss, but you can use either one.

Bake for 20 minutes, then increase the temperature to 425°F and bake an additional 10 minutes or until the top is golden and bubbly.

Allow to cool slightly before cutting into and serving.

What are the Ingredients to Chicken Cordon Bleu?

The basic ingredients for chicken cordon bleu are chicken, ham and cheese. Since this recipe is the casserole version, the cheese was also added to a creamy sauce and cauliflower was also added to make it a complete meal.

What is the Bleu in Chicken Cordon Bleu?

The "bleu" gets its name from the French term "blue ribbon".

What is Cordon Bleu Sauce Made of?

Cordon bleu sauce is a cream sauce made from milk, flour, butter, dijon mustard, garlic, parmesan and spices. I put my own spin on it using heavy cream, gruyere cheese, dijon mustard, garlic salt and mascarpone cheese.

How Many Calories and Carbs are in Chicken Cordon Bleu?

In this casserole version of chicken cordon bleu, there are 501 calories and 3 net carbs.

Can you Freeze Chicken Cordon Bleu?

Yes, you absolutely can. Some recipes with heavy cream do not freeze well. That is not the case with this Keto casserole. Because the cream is mixed with other ingredients to make the sauce, this helps to stabilize the cream and will prevent it from separating when thawed.

Allow the casserole to cool to room temperature before moving it to the freezer. You can use these freezer safe containers for leftovers, they work beautifully!

Tips for Making This Gluten Free Chicken Cordon Bleu Casserole

• In order to keep this casserole as low carb as possible, use a Keto friendly baked ham. Always read the labels on ham to check for any added ingredients or sugars you want to avoid.

• It's always better to grate your own cheese. Pre-grated cheese usually has anti-caking ingredients that are not acceptable on Keto or low carb diets.

• If you're going to be short of time, this casserole can be made the night before. Assemble all the ingredients, wrap it or cover it well and place it in the fridge. All that's left is baking it, when you're ready.

Substitutions for Low Carb Chicken Cordon Bleu Casserole

• If the rotisserie chicken where you shop has sugar added, you can always cook your own. You can use dark meat, white meat, or a combination of both.
• This recipe calls for fresh cauliflower. To save a little time, you can buy the pre-cut florets, then roast them.
• If you don't have mascarpone, you can substitute it for cream cheese. The cream cheese will have less creaminess and a more tart flavor, but it's a suitable substitution. Because cream cheese has more carbs, be sure to adjust your macros accordingly.
• Provolone cheese can be used instead of Swiss without it drastically changing the flavor profile.
• You can also use swiss cheese instead of gruyere if you'd like, though I highly recommend gruyere because it adds a slightly nutty flavor to the sauce.

More Keto Casseroles

• Chicken Parmesan Casserole
• Loaded Creamy Cauliflower Casserole
• Chicken Alfredo Casserole
• Easy Sausage and Pepper Breakfast Casserole
• Chicken Broccoli Casserole
• Chicken Florentine Casserole

*Originally published on July 26, 2018, updated on February 27, 2023 with new photos, improvements to the recipe and helpful tips.