Tender chicken, sautéed mushrooms and healthy spinach baked in a rich cheesy sauce makes this Keto Chicken Florentine Casserole your new favorite easy dinner!
FREE EASY KETO DINNERS EBOOK
Jump to:
- ❤️ Why You'll Love This Chicken Florentine Casserole
- 🛒 Ingredients For Keto Chicken Casserole
- 🔪 How to Make Chicken Florentine Casserole
- 💡 Tips for Making Keto Chicken Casserole
- ☑️ Storage Instructions
- 🍴 What to Serve with Chicken Florentine
- 🔄 Substitutions and Additions
- What is chicken Florentine made of?
- How many carbs are in chicken Florentine?
- What kind of chicken can I eat on Keto?
- What is the origin of chicken Florentine?
- Why is spinach associated with Florence?
- 🍽️ More Keto Casseroles
❤️ Why You'll Love This Chicken Florentine Casserole
- Tender chicken, sautéed mushrooms and healthy spinach
- Rich and creamy cheese sauce
- Baked with melted mozzarella cheese on top
- Loaded with healthy fats
- Easy to prepare, even make it ahead and bake when you're ready
This is one of my very favorite casseroles to make! If you need a last minute Low Carb dinner recipe, this Chicken Florentine casserole can be made with ingredients you might already have on hand!
One of the best things about casseroles, is they are typically very easy to put together and often have a fair amount of servings. This is great for anyone who struggles with meal prepping and having enough Keto meals on hand.
When you bake this chicken florentine, your kitchen is going to smell amazing!! You will find yourself making this one again and again! It also freezes perfectly, so don't let your leftovers go to waste!
🛒 Ingredients For Keto Chicken Casserole
- Cooked Chicken
- Mushrooms
- Frozen spinach
- Heavy cream
- Mascarpone cheese
- Parmesan cheese
- Mozzarella cheese
- Garlic
- Butter
- Salt
- Pepper
*Exact measurements are listed in the recipe card below.
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🔪 How to Make Chicken Florentine Casserole
Preheat oven to 375°F.
Heat a skillet to medium and add in the butter, then once melted, add in the mushrooms.
Sauté for a few minutes and once they have some good color, add in the garlic.
Sauté for about 15 seconds, then add in the mascarpone cheese, turn off the heat and stir until melted. Remove from the heat and allow to cool slightly.
In a large mixing bowl, add in the chicken, spinach, grated parmesan cheese salt and pepper.
Add in the heavy cream, half the mozzarella cheese and the mushrooms, garlic and mascarpone mixture.
Stir until well combined, then pour into a 9 x 9 casserole baking dish that's been sprayed with nonstick spray.
Add the remaining mozzarella cheese over the top.
Bake for 30 minutes or until the cheese is golden.
💡 Tips for Making Keto Chicken Casserole
- This can be a great make-ahead dinner, especially for busy weeknights. Simply prepare the ingredients, mix together and add them to the casserole dish. Then store in the fridge, top with the shredded mozzarella cheese and bake when you're ready.
- To make your life easier, you can pick up a rotisserie chicken, shred it up and use it in this recipe. It's definitely a time-saver, verses cooking your own chicken.
☑️ Storage Instructions
Store leftovers in an airtight container in a fridge for a few days or freeze.
🍴 What to Serve with Chicken Florentine
Since this Keto casserole is rich in flavor and healthy fats, a simple side salad would be the most suitable pairing. Greek Salad, Classic Wedge Salad, Mediterranean Cucumber Salad or this Strawberry Spinach Salad are all great options.
🔄 Substitutions and Additions
- Chicken: As I mentioned above, using store bought rotisserie chicken is a great time saver.
- Mushrooms: Fresh mushrooms are best and have the most flavor, but in a pinch, you can use jarred/canned mushrooms.
- Onions or Leeks: For added flavor, you can sauté some yellow onions or leeks along with the mushrooms and add them into the casserole.
- Cheese: If you're out of parmesan cheese, Romano or Asiago will work just as well. Provolone or Monterey Jack also makes a great replacement for the mozzarella cheese.
- Spinach: If you happen to have fresh spinach on hand, you can sauté it in the skillet before adding it to the casserole. Just be sure to make a LOT, we know how spinach shrinks down to almost nothing once cooked!
- Mascarpone: If you don't have mascarpone cheese, cream cheese will work as well. Just be sure to adjust your macros accordingly, since cream cheese has slightly more carbs.
What is chicken Florentine made of?
The main components are spinach, chicken of course and a cream sauce. Garlic and a blend of cheeses give it great flavor, while the mushrooms make it hearty, filling and very tasty.
How many carbs are in chicken Florentine?
There are only 3 net carbs in each serving of this chicken Florentine casserole.
What kind of chicken can I eat on Keto?
The best thing about chicken on a Keto diet is that all parts, breast, thighs, legs and wings are perfectly suitable!
What is the origin of chicken Florentine?
While one might think it originated in Florence, Italy because of the name, it's not Italian, it's actually French.
Why is spinach associated with Florence?
Chicken Florentine originated in 1533 when Catherine de Medici, a Florentine aristocrat, married a French prince and brought her recipes and love for spinach to France, or so the story goes. When you see "Florentine" recipes, they most often contain spinach as a main ingredient.
🍽️ More Keto Casseroles
- Chicken Parmesan Casserole
- Loaded Creamy Cauliflower Casserole
- Chicken Cordon Bleu Casserole
- Easy Sausage and Pepper Breakfast Casserole
- Chicken Broccoli Casserole
- Chicken Alfredo Casserole
FREE 20 EASY KETO RECIPES EBOOK
Keto Chicken Florentine Casserole
Ingredients
- 14 ounces shredded cooked chicken
- 8 ounces baby bella mushrooms, sliced
- 9 ounces frozen spinach, thawed and well drained
- 1 ½ cups shredded mozzarella cheese, divided
- 1 cup heavy cream
- 1 cup parmesan cheese, grated
- ½ cup mascarpone cheese
- 2 garlic cloves, minced
- 2 tablespoons butter
- ½ teaspoon salt
- ¼ teaspoon ground black pepper
Instructions
- Preheat oven to 375F. Heat a skillet to medium and add in the butter, then once melted, add in the mushrooms. Sauté for a few minutes and once they have some good color, add in the garlic.
- Sauté for about 15 seconds, then add in the mascarpone cheese, turn off the heat and stir until melted. Remove from the heat and allow to cool slightly.
- In a large mixing bowl, add in the chicken, spinach, grated parmesan cheese, salt and pepper. Add in the heavy cream, half the mozzarella cheese and the mushrooms, garlic and mascarpone mixture.
- Stir until well combined, then pour into a 9 x 9 casserole baking dish that's been sprayed with nonstick spray. Add the remaining mozzarella cheese over the top.
- Bake for 30 minutes or until the cheese is golden.
*Make sure to scroll up and read the post for substitutions, additions and helpful tips for making this recipe.
*Nutritional data is provided as a courtesy and is accurate to the best of my knowledge. You can verify it using the nutrition calculator of your choice. All data is based on net carbs, without sugar alcohol: Swerve, Erythritol, Monk Fruit or Allulose.
© Copyright for Keto Cooking Christian LLC. Please use the share buttons to share on social media, but please do not copy/paste the recipe.
Rate this Recipe*Originally published on August 14, 2018, updated on February 13, 2024 with improvements to the recipe, photos, new recipe information and helpful tips.
Wendy M Hewett
I made the Chicken Florentine Casserole this week. It was absolutely delicious and everyone in the house loved it.
Keto Cooking Christian
Thank you so much. It really is a delicious dish for the the whole family.
Elizabeth
Made this twice using two different subs for the mascarpone - first time was spinach artichoke dip from Costco, second time was cream cheese. Both were excellent! I also play fast and loose with how much and which kinds of cheese but the recipe lends a lot of flexibility there, which is greaf!
This last time I added half an onion to the pan with my fresh mushrooms and fresh spinach and garlic, just because I had it leftover and it needed to be used lol. We love onion in this house so it worked!
Keto Cooking Christian
That sounds amazing! I love how you made it your own with different cheeses and that extra onion. That's a great way to use what you have on hand.
Jan
I cubed the chicken instead of shredding it. Delicious dish and a definite winner.
Keto Cooking Christian
I'm so happy you enjoyed it.
QT618
This was great! I used fresh mushrooms and spinach which I cooked down. I cut a little over a pound of raw chicken breasts into bite sized chunks and followed the rest of the recipe as written. Everyone loved it and there were no leftovers! Served over rice for the non-keto eaters. Definitely will make again!
Keto Cooking Christian
Awesome, glad everyone loved it!
Lu416
Could you use a rotisserie chicken.: Besides just being quicker it’s very hard to find chicken during this time. No stores seem to have
Keto Cooking Christian
Absolutely, I do it all the time with my casseroles, if I'm short on time!
Marcelle
I made this using fresh mushrooms and spinach and also added some halved cherry tomatoes. This has become a "Keto Keeper" in my household! SOOOO tasty!
Keto Cooking Christian
Sounds wonderful, glad you enjoyed it!
Shawn
how much fresh spinach did you use?
Jess
So good! I sautéed fresh spinach and mushrooms as suggested in the notes. I even posted to my Instagram @ketolifestylewithjess
Keto Cooking Christian
That's wonderful and yes, I saw the pic of your casserole on IG, very nice!! Glad you enjoyed it 🙂
Donyell
Hello
Can this recipe be done in a slow cooker/crockpot?
Toni
How much is one serving? I'm assuming it's one cup but it's not listed.
Keto Cooking Christian
I honestly don't have it measured out, but it's 1/8th of the entire recipe.
Sybille Seidel
Can I sub Turkey for the chicken and would I have to adjust the recipe
Loved it with the chicken but Turkey season is almost here and I love it too
Keto Cooking Christian
Yes, you absolutely can and I would sub 1:1, so no adjustment would be needed. Great idea, thank you! I might have to try that myself with some leftovers 🙂
Ashley
This is definitely a very good recipe . I did have to replace the mascarpone ( I couldn’t get it ) with cottage cheese and it was so delicious.
Keto Cooking Christian
Awesome! Glad to hear you were able to substitute the mascarpone and still enjoyed it!
DoonieInOregon
This is sooooo yummy! My husband is doing keto but I am not (5 mo pregnant) and this was great for both of us. I took a smaller serving and served it over whole wheat pasta. He enjoyed his over steamed broccoli and cauliflower.
My modifications; Used a Costco chicken to cut down on prep time. Upped the garlic to three large cloves (we love garlic!). Sautéed a mix of fresh crimini and shiitake mushrooms we had on hand along with a bag of fresh spinach. I also crumbled just a few crunchy pieces of bacon on top for texture for my hubby. Used a cup and half of cream so it was a bit more saucy which we enjoyed.
Thanks for the great recipe! We will make it again.
Keto Cooking Christian
Glad you both enjoyed the casserole and thanks for sharing your modifications!
Dawn
What sides would be good with this? Could I put it over pasta??
Keto Cooking Christian
Hi Dawn,
Pasta wouldn't be Keto or Low Carb. I would recommend something light like a salad.
Trudi G
Hi! Do u have to add the mushrooms?
Keto Cooking Christian
Hello! If you don't care for mushrooms, you can omit them if you want.
Kathy
Can I use fresh mushrooms and fresh spinach instead? Also, would cream cheese work in place of the mascarpone?
Thank you, Kathy
Keto Cooking Christian
Hi Kathy, yes to all 3 substitutions, they should all work just fine! With the fresh spinach and mushrooms, I would definitely sauté them before mixing it into the mixing bowl with the other ingredients prior to baking. This will get all the water out so the casserole will hold together and won't be watery. I hope that helps!
Cindy
This looks good, however in the picture, the mushrooms that added to the chicken look to be canned. If I use fresh mushrooms, what adjustments do you suggest I make?
Keto Cooking Christian
Hi Cindy,
I almost never used canned mushrooms, but I decided to in order to make this a really quick and easy casserole to put together. I can certainly understand wanting to use fresh instead, so I would sauté them before adding them to the mixture. This will get them to release most of their moisture that you can discard, and won't make the casserole watery. I hope that helps!
Cindy
It was delicious, we all loved it.
Keto Cooking Christian
Fantastic! Thanks for coming back to let me know. Glad you liked it 🙂
Darcie
This is my absolute all time favorite casserole recipe! So much flavor and extremely easy to make. I have made 3 times and it is my go-to recipe. I make it on Sunday and it last all week for work. It heats up beautifully and the flavor never leaves! I recommend this to anyone for an easy meal for the family or just portion for lunches. So delectable!!!
Keto Cooking Christian
Thank you for the wonderful feedback! I'm so glad you like it, I make it all the time too 🙂
Michele
Excellent! Just made this for dinner and it is a home run!
Keto Cooking Christian
It's actually one of my favorite casseroles! I'm glad to hear that you enjoyed it 🙂