Creamy Spinach Stuffed Flounder

Creamy Spinach Stuffed Flounder

Creamy Spinach stuffed flounder is the perfect main course for a special occasion like Valentine’s day or Mother’s day dinner. It packs a wow factor but is really simple to make. Originally published February 2021. Last updated February 2023

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creamy spinach stuffed fish

This creamy spinach stuffed flounder is filled with flavor. It’s great for those following a  keto diet. It’s also one of those dishes that looks super fancy that you can serve for a special occasion, but actually only takes you 30 minutes to create.


Creamy spinach stuffed flounder ingredients

(Note: the full ingredients list, including measurements, is provided in the recipe card directly below.)

Flounder fillet – flounder is meaty enough to hold the stuffing, but it’s flavor is mild. Fresh fish is best, but you can also use frozen fillets.

Spinach – you can use fresh spinach, but I prefer frozen because you get so much more in one pack. 

Bell Peppers and Onions – I love using fresh veggies to pack in more nutrients and flavor to this dish.

Heavy cream– This gives the spinach that creamy texture.

Parmesan cheese –  Use freshly grated parmesan cheese. The salty, nutty flavor from the parmesan gives this dish so much life!

Lemon Juice – Citrus and fish just make a good marriage. The lemon juice brings some acid to a creamy dish to balance out the flavors.   

Tools to make your Creamy Stuffed Fish at home

You’ll need a sauté pan to prepare the spinach. My preference is stainless steal or something non-stick. In addition you’re going to need a baking pan to finish off the stuffed fish in the oven. I like this one that comes with a cover for easy storage.

How to make creamy spinach stuffed flounder

We’re baking our stuffed flounder because I think that’s the easiest approach. However, you can consider cooking this in the air fryer or on a pan with a little oil. 

In the oven this dish is done within 20 minutes. You would probably split that time in half in your air fryer.

Use a cooking thermometer to test your fish for doneness. It should read 145 degrees Fahrenheit. 



creamy spinach


creamy spinach

Creamy spinach stuffed flounder recipe

Yield: 2

Creamy Spinach Stuffed Flounder

creamy spinach stuffed flounder

Creamy spinach stuffed flounder is filled with flavor. It's great for those following a  keto diet. It’s also one of those dishes that looks super fancy that you can serve for a special occasion, but actually only takes you 30 minutes to create.

Prep Time 30 minutes
Cook Time 20 minutes
Total Time 50 minutes


  • 2 filets of flounder (or other fish)
  • Juice of 1 lemon
  • 1 small onion
  • 2 cloves garlic- minced
  • 1 red bell dice fine
  • 3/4 quarter cup heavy cream
  • 1 cup shredded parmesan
  • 1 package frozen spinach
  • pinch of nutmeg
  • salt
  • black pepper
  • garlic powder
  • onion powder
  • 2 tablespoon olive oil


Prep the fish

Pre-heat oven at 350 degrees

Squeeze fresh lemon juice over each fillet of fish.

Season both sides with: salt, black pepper, onion powder, garlic powder. 

Set aside while you prep the cream spinach.

Creamy Spinach Filling

Add a tablespoon of olive oil to a pan and sauté onions, garlic, and bell pepper for 5 minutes or until peppers are tender and onions are translucent.

Add package of frozen spinach.

Season with black pepper, salt, and a pinch of nutmeg.

Add heavy cream and stir mixture. Cook over low heat for 5 minutes.

Once mixture starts to bubble add cheese and turn off heat.


Cut a slit in the side of the fish from the widest part down to create a pocket.

Stuff with spinach mixture.

Secure the pocket of fish with toothpicks or baking twine.

Drizzle 1 tablespoon olive oil over filets. Place fish in a lined backing dish

Bake at 350 degrees for 20 minutes

Serve immediately with rice, pasta, or mashed potatoes, and steamed or grilled vegetables.




What to serve with spinach stuffed flounder

This spinach stuffed fish would be so delicious over a bed of mashed potatoes. When bits of the creamy spinach goodness spills out over the potatoes, you will do a whole body roll because it’s that good. 

I would also consider serving this with rice or pasta However, if I wanted to lighten things up, I’d do grilled veggies or steamed broccoli.

What to sip with your creamy spinach stuffed flounder

If I was doing this for a special occasion a brut sparkling wine would be my go to – I think bubbles are good with everything though. 

If it was just a regular shmegular weekday dinner, then I’d go for a rose, pinot grigio, or a sauvignon blanc.  

What fish should you use for creamy stuffed fish?

Other options for this dish are: salmon, halibut, and orange roughy.  Any fish can work with this creamy spinach stuffing.



How to store your stuffed fish leftovers

This dish tastes best immediately after it comes out the oven.  However, if you do happen to have any leftovers, store them in an airtight container and refrigerate for up to three days for optimal freshness. 

Other Recipes You may enjoy:

Mediterranean salmon and orzo
Air fryer turkey legs
Fried Goat Cheese Salad

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