Low-Carb Baked Seafood Casserole Recipe (2024)

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ThisLow-Carb Baked Seafood Casserole Recipe is a creamy baked main course with shrimp and cod. This delicious recipe can work for low-carb, keto, gluten-free, grain-free, Atkins, diabetic, or Banting diets.

Low-Carb Baked Seafood Casserole Recipe (1)

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This Low-Carb Baked Seafood Casserole Recipe has a creamy base with hints of wine and just the right amount of seasoning. Leeks and celery add even more flavor to the sauce. Tender shrimp and bites of flaky cod are the real stars in this seafood show! Topping it all off is a crunchy, seasoned crumbs made of almond flour and parmesan cheese.

If I could change one thing about this recipe, it would be to make the top just a little prettier. In fact, I had intended to do just that, but then I tasted it. I loved the flavor of this casserole so much that I realized there was no way I could mess with my recipe. Pretty is nice, but, for me, flavor is king. I just won’t screw up the flavor to try to make a better looking casserole. Especially not when it’s as good as the flavor of this casserole!

Low-Carb Baked Seafood Casserole Recipe (2)

The idea for this recipe came, once again, from a recipe I saw in a 1992 special edition of Bon Appetit magazine, called Favorite Restaurant Recipes. I loved the idea their “Low Country Casserole”, a creamy casserole with seafood and leeks. While my final recipe doesn’t look one bit like theirs does, I do love to share where my inspiration comes from.

Low-Carb Baked Seafood Casserole Recipe (3)

This recipe would be delicious served for dinner with a salad and maybe some of myLow-Carb Sour Cream Biscuitsor myLow-Carb Onion Dill Savory Scones. It would also make a tremendous addition to a Sunday brunch. What an elegant feast! Enjoy!

Annissa

Low-Carb Baked Seafood Casserole Recipe (4)

Create a mouthwatering low-carb dinner with our Low-Carb Baked Seafood Casserole! This recipe has a creamy base with hints of wine, and is topped with crunchy, seasoned crumbs made of almond flour and parmesan cheese. Definitely an elegant feast! 🍤🍲😋

Low-Carb Baked Seafood Casserole Recipe (5)

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ThisLow-Carb Baked Seafood Casserole Recipe is a creamy baked main course with shrimp and cod. This delicious recipe can work for low-carb, keto, gluten-free, grain-free, Atkins, diabetic, or Banting diets

Course Main Course

Cuisine American

Prep Time 30 minutes

Cook Time 20 minutes

Total Time 50 minutes

Servings 6

Author Annissa Slusher

Ingredients

For the poached seafood:

  • 1 cup dry white wine
  • 1 cup water
  • 2 small bay leaves whole
  • 1/2 teaspoon Old Bay Seasoning
  • 12 ounces shrimp thawed, peeled and deveined
  • 12 ounces cod cut into 1" squares

For the vegetables:

  • 2 tablespoons butter
  • 2 medium leeks white part only, cleaned and cut into matchstick pieces
  • 2 stalks celery diced
  • sea salt

For the sauce:

  • 1 tablespoon butter
  • 1/2 teaspoon xanthan gum
  • 1 cup heavy whipping cream
  • 1/4 teaspoon sea salt (or to taste)

For the topping:

  • 4 ounces parmesan cheese shredded
  • 1/4 cup super fine almond flour
  • 2 teaspoons Old Bay Seasoning
  • 1 tablespoon butter
  • 1 tablespoon fresh parsley chopped (optional for garnish)

Instructions

For the poached seafood:

  1. Preheat oven to 400º Fahrenheit. In a large, heavy saucepan, stir together dry white wine, water, bay leaves, and 1/2 teaspoon Old Bay. Bring poaching mixture to a simmer over medium high heat. Turn heat to low, and simmer, uncovered for about 3 minutes.

    Low-Carb Baked Seafood Casserole Recipe (6)

  2. Add shrimp to the poaching mixture. Simmer shrimp until barely opaque, then remove to a bowl using a slotted spoon. Repeat for the cod. Reserve shrimp and cod for later.

    Low-Carb Baked Seafood Casserole Recipe (7)

  3. Simmer the poaching mixture over medium high heat until reduced to about 1 cup of liquid. Remove from heat, strain, and reserve for later.

    Low-Carb Baked Seafood Casserole Recipe (8)

  4. Meanwhile, melt two tablespoons butter in a large heavy saucepan or Dutch oven over medium-high heat. When butter stops foaming, add leeks and celery. Sprinkle lightly with sea salt. Cook leeks and celery, stirring occasionally, until edges begin to brown and vegetables are soft. Remove from heat.

    Low-Carb Baked Seafood Casserole Recipe (9)

  5. Layer vegetables and seafood in a casserole dish. I used a handmade artisan dish, but any casserole that holds 7-8 cups should work. An 8" square baking dish should work as well.

    Low-Carb Baked Seafood Casserole Recipe (10)

For the sauce:

  1. Over medium heat, melt remaining tablespoon of butter in the same saucepan or Dutch oven used to cook the vegetables, without cleaning. Stir in the xanthan gum.

  2. After xanthan gum is coated with butter, slowly stir in the reduced and strained poaching liquid. Bring liquid to a simmer, scraping up any browned bits in the pan.

    Low-Carb Baked Seafood Casserole Recipe (11)

  3. When mixture has started to thicken, stir in the heavy whipping cream. Bring to a simmer and cook, stirring frequently, until mixture has a gravy-like texture. Taste and add salt (I used 1/4 teaspoon) if desired. Pour mixture over the seafood and vegetables in the casserole dish.

    Low-Carb Baked Seafood Casserole Recipe (12)

For the topping:

  1. Place almond flour, parmesan cheese, 2 teaspoons Old Bay, and 1 tablespoon butter in a food processor. Pulse until completely blended. Sprinkle mixture on top of the casserole. Bake for about 20 minutes, or until top is crisp and brown.

    Low-Carb Baked Seafood Casserole Recipe (13)

  2. If desired, sprinkle chopped parsley on to garnish before serving.

    Low-Carb Baked Seafood Casserole Recipe (14)

Recipe Notes

Serving size: 1/6th of the recipe (about 1 cup)

Per serving:

Calories 377

Fat (g): 25

Carbs (g): 7

Fiber (g): 1

Protein (g): 29

Net Carbs (g): 6

  1. Low-Carb Baked Seafood Casserole Recipe (15)

    Ellen on October 26, 2018 at 6:00 am

    I have never made a seafood casserole but that’s about to change. This looks delicious!

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (16)

      Rosemary merhige on September 1, 2019 at 10:55 am

      Can I make this ahead of time and keep for a day or two before serving. Bake and reheat? Or just repare and refrigerate?

      Reply

    • Low-Carb Baked Seafood Casserole Recipe (18)

      Rod Woosnam on May 30, 2021 at 4:06 am

      Hi Ellen, just made this tonight and few mods, crumbled salads with the parmesan and chopped parsley for the top kind of like a great Mac & Cheese. You have a sister in Victoria who looks exactly like your twin.

      Reply

  2. Low-Carb Baked Seafood Casserole Recipe (19)

    kim on October 26, 2018 at 6:36 am

    This looks absolutely delicious! I’m so glad you shared… I know my whole family will love this!

    Reply

  3. Low-Carb Baked Seafood Casserole Recipe (20)

    Bintu | Recipes From A Pantry on October 26, 2018 at 7:12 am

    Now this is my kind of casserole. It looks so delicious and I love that it is low carb too!

    Reply

  4. Low-Carb Baked Seafood Casserole Recipe (21)

    Lauren Vavala | DeliciousLittleBites on October 26, 2018 at 7:53 am

    I’ve been collected low carb/keto recipes as I’m about to go back on that diet. I haven’t found anything like this before and LOVE that the topping does not involve pork rinds haha! Gong to add this to my must-make list!

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (22)

      Annissa on October 26, 2018 at 9:11 am

      Glad you found our website! Good luck on your low-carb diet!
      -Annissa

      Reply

  5. Low-Carb Baked Seafood Casserole Recipe (23)

    Tayler Ross on October 26, 2018 at 8:31 am

    This looks like total comfort food! My family would love this dish!

    Reply

  6. Low-Carb Baked Seafood Casserole Recipe (24)

    Jeanette on January 20, 2019 at 7:38 pm

    This recipe surprised me. It is excellent. I used shrimp, scallops, and meat of king crab legs. The poaching liquid, the leeks, the sauce, the topping, all work beautifully together. Very tasty, subtle flavor…almost licked my plate clean. Thanks!

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (25)

      Annissa on January 20, 2019 at 8:20 pm

      Thank you so much! I’m grateful that it surprised you in a good way!I won’t tell anyone if you do lick the plate next time.
      -Annissa

      Reply

  7. Low-Carb Baked Seafood Casserole Recipe (26)

    Amanda on February 19, 2019 at 5:40 pm

    Absolutely love this recipe! I’m making it tonight, again!

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (27)

      Annissa on February 19, 2019 at 7:53 pm

      I love it when my recipes become repeats!
      -Annissa

      Reply

    • Low-Carb Baked Seafood Casserole Recipe (28)

      Kathleen on January 9, 2022 at 6:04 pm

      Please provide the sodium count, absolutely delightful !

      Reply

  8. Low-Carb Baked Seafood Casserole Recipe (29)

    Todd watrous on March 16, 2019 at 8:37 am

    Can U bake a low carb type chicken pot pie???

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (30)

      Annissa on March 16, 2019 at 1:35 pm

      I created a recipe for this as a guest post for IBIH. Here is the link: Low-Carb Chicken Pot Pie.
      -Annissa

      Reply

  9. Low-Carb Baked Seafood Casserole Recipe (31)

    Roslyn L Morrissey on June 10, 2019 at 9:38 am

    Excellent dish! On the ‘Keeper’ list.

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (33)

      Annissa on June 12, 2019 at 9:10 pm

      A little broth would do the trick.

      Reply

  10. Low-Carb Baked Seafood Casserole Recipe (34)

    Linda on June 30, 2019 at 9:42 pm

    I have made this once already and it is fabulous. Im not on any diet, i just love seafood and casseroles. Now going to make it for company this weekend. Love, love, love.

    Reply

  11. Low-Carb Baked Seafood Casserole Recipe (35)

    Joan on November 24, 2019 at 9:28 pm

    Excellent recipe! I was skeptical with so many steps but came out perfect. Thank you!

    Reply

  12. Low-Carb Baked Seafood Casserole Recipe (36)

    Terry on December 22, 2019 at 1:36 pm

    Can’t wait to make this dish. We always have seafood on Christmas Eve. I’ll make it early in the day and refrigerate it. That way the flavors will meld and cook it after evening church. There will be less bustle getting the meal served and more time with guest. My mouth is watering just thinking about it. Thank you!

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (37)

      Annissa Slusher on December 26, 2019 at 8:43 pm

      Hi Terry!
      Sounds like a good plan! I hope you all enjoyed it!
      -Annissa

      Reply

  13. Low-Carb Baked Seafood Casserole Recipe (38)

    Telisha Conklin on January 3, 2020 at 10:25 am

    Since starting Keto, my hubby has been extremely picky and at time annoying with regards to his opinion on the outcomes of the recipes I have created. So going into this I was extremely skeptical and since I do not like seafood in the slightest I had no idea how it turned out and til he ate it. Bracing myself for his lackluster response or irritating critique of what could have been better, he comes into the room and RAVES about how delicious this meal was!!!! Thank you so much! This will definitely be added into my menu making Rolodex! You rock!!!!

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (39)

      Annissa Slusher on January 7, 2020 at 10:31 pm

      Hi praise indeed! Thanks so much! I’m so glad that one of my recipes worked out for you and your hubby!
      -Annissa

      Reply

  14. Low-Carb Baked Seafood Casserole Recipe (40)

    Carly on January 5, 2020 at 1:51 pm

    Any ideas on what to use instead of leaks?

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (41)

      Annissa Slusher on January 7, 2020 at 10:24 pm

      Onions or green onions would work also.

      Reply

    • Low-Carb Baked Seafood Casserole Recipe (42)

      Telisha Conklin on January 19, 2020 at 6:40 pm

      I used zucchini, he loved it!!!

      Reply

  15. Low-Carb Baked Seafood Casserole Recipe (43)

    K on February 14, 2020 at 4:12 am

    Does this recipe freeze well?

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (44)

      Annissa Slusher on February 20, 2020 at 10:03 am

      I’ve never frozen it. My guess is that it’s better fresh. I think reheating seafood often results in rubbery overcooked meat.
      I would also worry about the sauce separating.

      Annissa

      Reply

  16. Low-Carb Baked Seafood Casserole Recipe (45)

    Renee F. on March 4, 2020 at 1:08 pm

    This recipe was a hit last year during Lent Season for the entire family of six, ages ranging from 3 – 43! I made is 3 more times due to the high demand. I did add about 2 cups of crab meat. I plan to make this again for this Friday’s dinner. Thanks for sharing!

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (46)

      Annissa Slusher on March 4, 2020 at 2:16 pm

      I love the idea of adding crab meat. Sounds wonderful! Glad your family is enjoying the recipe!
      -Annissa

      Reply

  17. Low-Carb Baked Seafood Casserole Recipe (47)

    Lucille R Metzger on June 6, 2020 at 8:45 pm

    I will be making this as soon as I get my seafood. Looks delicious!

    Reply

  18. Low-Carb Baked Seafood Casserole Recipe (48)

    Lisa on June 13, 2020 at 9:59 am

    That looks delicious!

    Reply

  19. Low-Carb Baked Seafood Casserole Recipe (49)

    Jen on September 6, 2020 at 8:15 pm

    Really tasty and a comfort-food dish I will keep on rotation for “Seafood Sunday” now 🙂

    I used cod, shrimp, and crab. I might try sea scallops in the future. My store didn’t have leeks, so I used green onions as suggested.

    It tasted great with splashes of Texas Pete’s hot sauce on top upon serving.

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (50)

      Annissa Slusher on September 7, 2020 at 10:11 pm

      Glad you enjoyed it! Thanks for sharing your substitutions! It’s hard to find some ingredients these days.
      -Annissa

      Reply

  20. Low-Carb Baked Seafood Casserole Recipe (51)

    Jane Griffith on October 11, 2020 at 9:55 am

    What a fantastic recipe! My husband & I have enjoyed this many times & have also served to company. It’s so easy to double it, too. I always add scallops along with the shrimp & whatever whitefish I have. We love the sweetness that the leeks brings to this heavenly casserole.

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (52)

      Annissa Slusher on October 13, 2020 at 1:10 pm

      Glad you enjoyed it! I love your choice of seafood!
      -Annissa

      Reply

    • Low-Carb Baked Seafood Casserole Recipe (53)

      Gemine on November 1, 2020 at 11:44 am

      Hi Jane
      Quick question, when you use scallops do you also poach it before adding to casserole dish and then baking or do they cook better when only baked?

      Thanks in advance!
      Gemine from South Africa 🙂

      Reply

  21. Low-Carb Baked Seafood Casserole Recipe (54)

    susan brooks on November 1, 2020 at 8:18 am

    WHat is xanthum gum? A thickener?Can anything else be substituted ….I haven’t got any and want to try this recipe asap!
    Thanks,
    S Brooks

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (55)

      Annissa Slusher on November 2, 2020 at 4:10 pm

      Hi Susan,
      Xanthin gum is a thickener. Other thickeners would work in this recipe, but you may need to adjust the amount.

      Best,

      Annissa

      Reply

  22. Low-Carb Baked Seafood Casserole Recipe (56)

    Carol Howell on February 17, 2021 at 1:49 pm

    I have made this several times, substituting clams or halibut cheeks due to a shellfish allergy. It is always spot on fabulous!!!

    Reply

  23. Low-Carb Baked Seafood Casserole Recipe (57)

    Chip on February 24, 2021 at 8:48 am

    I cooked this last night for a small dinner party. It was a huge hit! So delicious and so easy to prepare!

    Reply

  24. Low-Carb Baked Seafood Casserole Recipe (58)

    Julie on March 9, 2021 at 10:20 pm

    This was so good! I admit I didn’t 100% follow the recipe because I was chasing my 11 month old out of the kitchen, so like I didn’t combine the sauces like you did. I added some Chilean dried chiles and sautéed carrots. The whole family loved it!

    Reply

  25. Low-Carb Baked Seafood Casserole Recipe (59)

    Dot Wright on August 29, 2021 at 1:08 pm

    Can I use something other than Old Bay seasoning? My Kroger did not carry it
    Thanks

    Reply

    • Low-Carb Baked Seafood Casserole Recipe (60)

      Annissa Slusher on August 29, 2021 at 8:05 pm

      Any sort of seafood seasoning blend would work.Old Bay is a blend of celery salt, red pepper, black pepper and paprika. Something similar should work well.
      -Annissa

      Reply

  26. Low-Carb Baked Seafood Casserole Recipe (61)

    Dawn on September 14, 2022 at 6:23 am

    Made last night and was absolutely amazing!!!

    Reply

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Low-Carb Baked Seafood Casserole Recipe (2024)

FAQs

What seafood is keto? ›

Mackerel – Its oily, dark flesh makes it a keto diet necessity because of its high fat content. Tuna – Think beyond the can and try wild fresh tuna in your favorite keto fish recipes. This low-carb and omega-3 rich favorite lends itself deliciously to many preparations ranging from raw to seared to grilled.

Is shrimp keto friendly? ›

If you're following a keto diet, shrimp is keto-friendly, virtually carb-free, and very low in fat and calories. Healthy, clean proteins like shrimp make it painless to limit carbs, and the low fat and calorie counts mean you can manage weight while feeling full and enjoying fantastic meals.

Can seafood casserole be frozen? ›

Can I Freeze a Seafood Casserole? You absolutely can.

What is in casserole? ›

In the United States, a casserole or hot dish is typically a baked food with three main components: pieces of meat (such as chicken or ground meat) or fish (such as tuna) or other protein (such as beans or tofu), various chopped or canned vegetables (such as green beans or peas), and a starchy binder (such as flour, ...

What is the best fish to eat on a low-carb diet? ›

Additionally, you now know that when it comes to finding the best fish for keto friendly dinner ideas, it's best consider salmon, trout, and tuna. These fish are all high in healthy fats and protein, making them perfect choices for those following a ketogenic lifestyle.

Which seafood is not keto-friendly? ›

Fish and shellfish are very keto-friendly. Salmon and other fish are not only nearly carb-free but also rich in B vitamins, potassium, and selenium ( 9 ). However, the carb count in shellfish varies by type. While shrimp and most crabs contain no carbs, oysters and octopus do.

How many eggs a day on a keto diet? ›

It's totally fine and safe to eat up to 6 eggs a day while on the keto diet. You can consume even more eggs per day occasionally, as long as you make sure that you eat your greens, healthy fats and proteins from other sources.

How many carbs a day on keto? ›

On the keto diet, you are allowed to have no more than 50 grams of net carbs per day – and the fewer, the better! But by focusing on “net” rather than “total” carbs, you won't be denying your body the essential fiber it needs for proper function.

What vegetables not to eat on keto? ›

On the keto diet, you should restrict the consumption of starchy vegetables such as potatoes, yams, and corn.

Does sour cream freeze well in a casserole? ›

However, products made with sour cream, such as baked goods and soups, can typically be frozen without negatively affecting their texture or taste.

What casseroles do not freeze well? ›

Avoid freezing casseroles made with dairy products (especially soft cheeses with a high-water content like ricotta or cottage), eggs, starchy vegetables, and watery vegetables like lettuce and cucumber.

Should I thaw frozen casserole before baking? ›

Thaw Before Cooking

First, even in a hot oven, a frozen casserole takes hours to thaw, and the cooking will always be uneven. The edges will brown and bubble, while the center is still cool to the touch, even icy.

Do you cover casserole when baking? ›

Generally, casseroles with grains, rice or pasta that will cook during the baking process are usually covered, for at least part of the time. Casseroles made of cooked ingredients are usually baked uncovered. If you like a crisper, browner top, be sure the casserole is uncovered for at least part of the bake time.

What are the 5 parts needed for a casserole? ›

According to food blog High Heeled Homemaker, your basic casserole requires five ingredients: a protein, starch, vegetable, sauce, and cheese. If you have those five ingredients in your casserole dish, congratulations; you just made a casserole, whether it's a beloved recipe or a concoction of your own creation.

What are the 4 parts of a casserole? ›

Not every single casserole has all of them, but as a rule of thumb, here's what to look for: a starch, a binding agent or sauce, and a protein or vegetable. Many casseroles also have both vegetables and proteins, as well as a crunchy element to give some textural contrast, and cheese.

Can I eat crab in keto? ›

So, what seafood is keto friendly? The healthiest and best seafood to consume while on the keto diet is high in protein and healthy fats while low in carbohydrates. Some of the best keto friendly seafood include salmon, mahi-mahi, mackerel, and crab.

Can I eat lobster on a keto diet? ›

Can I Eat Lobster While on the Keto Diet? Yes, you can enjoy delicious, succulent lobster on the Keto Diet. Lobster Is high in protein and carb-free, which makes it the perfect staple for a Keto meal. You'll also get other nutrients when you eat lobster such as calcium, iron and a hefty dose of selenium.

Can you eat frozen fish on keto? ›

Aside from dairy products and red meat, seafood is also an excellent food choice for keto diets. In general, seafood contains very low amounts of carbohydrates, thus, it is naturally keto-friendly.

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