A casserole of chicken, mushrooms and spinach swimming in creamy Alfredo sauce and baked with gooey cheese on top!

All the flavors of Alfredo sauce packed into this chicken alfredo casserole and topped with gooey melted mozzarella cheese!  I add in fresh baby bella mushrooms and spinach to make this dish a complete meal with a huge boost of potassium!

It's loaded with yummy creaminess from the heavy cream, grass-fed butter, mascarpone cheese and fresh grated parmesan.

This is a super easy low carb chicken casserole that you will find yourself making again and again! And the great thing about this casserole is it makes a generous amount of servings which makes it perfect for meal prepping!  

What's in Low Carb Chicken Alfredo

• Cooked chicken breasts
• Baby bella mushrooms
• Frozen spinach
• Heavy cream
• Mozzarella cheese
• Mascarpone cheese
• Parmesan cheese
• Grass-fed butter
• Chicken stock
• Olive oil
• Garlic clove
• Salt
• Fresh parsley
• Pepper

*Exact measurements are listed in the recipe card below.

How to Make Keto Chicken Alfredo Casserole

Preheat oven to 400F.

Add 1 tablespoon of butter and 1 tablespoon of olive oil to a saucepan over medium heat.  Add  in the mushrooms and sauté for a few minutes until they have some good color.

Remove and add a little more butter to the pan, then sauté the garlic for about 20 seconds, careful not to burn it!

Add in the rest of the butter, chicken stock, heavy cream, mascarpone cheese, salt and pepper and stir until melted.  Add in the parmesan cheese and parsley, continue stirring until everything has melted.

In a large mixing bowl, add in the chicken, mushrooms and spinach.

Stir in the 1 cup of the shredded mozzarella cheese.

Pour the sauce over the top and mix to combine.

Pour the mixture into a 9" X 9" casserole or glass baking dish that has been sprayed with nonstick spray.

Spread the mixture evenly and top with the remaining mozzarella cheese and bake for 15 minutes.  Increase the temperature to 425F and bake for another 10 minutes or until the cheese is golden.

Allow to cool slightly before serving.  This is such a rich and delicious meal that its perfect served as a complete meal. If you want to serve with a Keto side dish, I recommend a side salad to lighten things up a little.

Store leftovers in the fridge for a few day or two.

Is Alfredo Keto?

It certainly is. Well, homemade alfredo sauce is. It is mostly cream and cheese. That is what I consider the PERFECT Keto sauce.

Can I Freeze Chicken Alfredo Casserole?

Absolutely! This casserole freezes very well. It should be noted than sometimes the dairy in casseroles will try to separate some. If that happens to you with this keto chicken casserole, give it a gentle stir to reincorporate the sauce and it will just fine.

In order to keep the casserole as fresh as possible while in the freezer, you will want to freeze it in an airtight container. If there is a lot of space between the top of the casserole and the lid, place a piece of plastic wrap directly on top of the casserole.

It will keep for up to several months.

Other Ways to Serve Keto Alfredo Sauce

Once you taste the flavors of this low carb sauce, you may want to try some of these delicious ways to serve it.

I love it over grilled shrimp and served along with Palmini Noodles or zucchini Alfredo sauce makes a great dipping sauce for these Keto Italian Breadsticks Drizzle low carb alfredo sauce over Keto Fried Chicken Tenders for a little bit of decadence.

The possibilities for this sauce is truly endless. You can serve it over any grilled veggies, like eggplant, zucchini or asparagus and it will take low carb veggies to a whole new level.

More easy Keto and Low Carb Casseroles

• Spinach Artichoke Casserole
• Chicken Parmesan Casserole
• Easy Taco Casserole
• Chicken Pot Pie Casserole
• Loaded Creamy Cauliflower Casserole
• Chicken Cordon Bleu Casserole
• Easy Sausage & Pepper Casserole
• Bacon Cheeseburger Casserole
• Chicken Florentine Casserole