Creamy Carnivore Shrimp & Crab Cream Casserole

If you love rich, buttery seafood dishes, this Creamy Carnivore Shrimp & Crab Cream Casserole is the kind of dinner that feels wonderfully indulgent without needing pasta, rice, or breadcrumbs.

Tender shrimp and sweet crab are folded into a luxurious cream cheese and Parmesan sauce, then topped with melted mozzarella and baked until hot, creamy, and bubbling around the edges.

It’s an especially comforting recipe for a weekend dinner, but the preparation is simple enough that you can make it whenever you’re craving something warm and satisfying. The combination of shrimp and crab makes every bite taste like a little seafood feast.

For a strict carnivore approach, choose seafood and dairy products that fit your individual version of the diet and avoid optional seasonings or garnishes that don’t fit your plan.

❤️ Why You’ll Love This Recipe
Carnivore-friendly and very low carb
Packed with shrimp and crab
Rich and creamy
High in protein
No pasta, rice, or breadcrumbs
Easy one-dish dinner
Great for seafood lovers
Perfect for a cozy weekend meal
Delicious leftover
Naturally gluten-free
📋 Recipe Information

Prep Time: 15 minutes

Cook Time: 20–25 minutes

Total Time: About 40 minutes

Servings: 6

Course: Dinner, Main Dish, Casserole

Cuisine: American-inspired

Diet: Carnivore-Friendly, Low Carb, Keto-Friendly

🛒 Ingredients
Creamy Shrimp & Crab Casserole
1 pound large shrimp, peeled, deveined, and chopped
8 ounces lump crab meat, drained and picked over for shells
8 ounces cream cheese, softened
½ cup heavy cream
1 cup shredded mozzarella cheese
½ cup freshly grated Parmesan cheese
4 tablespoons butter
2 cloves garlic, minced (optional for less strict carnivore diets)
½ teaspoon sea salt
¼ teaspoon black pepper (optional)
¼ teaspoon Old Bay-style seafood seasoning (optional for non-strict carnivore)
Optional Topping
½ cup additional mozzarella
2 tablespoons Parmesan
Melted butter

For a stricter carnivore version, omit the garlic, pepper, seafood seasoning, and plant-based garnishes.

🍳 Equipment Needed
9×13-inch baking dish
Large skillet
Mixing bowl
Wooden spoon or spatula
Whisk
Measuring cups and spoons
👩‍🍳 How to Make Creamy Carnivore Shrimp & Crab Casserole
Step 1: Preheat the Oven

Preheat your oven to 375°F (190°C).

Lightly grease a 9×13-inch baking dish with butter.

Set it aside.

Step 2: Prepare the Seafood

Pat the shrimp dry with paper towels.

If using large shrimp, chop them into bite-sized pieces.

Drain the crab meat thoroughly and gently check for any remaining pieces of shell.

Set both aside.

Step 3: Sauté the Shrimp

Heat 2 tablespoons of butter in a large skillet over medium heat.

Add the shrimp.

Cook for approximately 2–3 minutes per side, just until the shrimp become opaque and are nearly cooked through.

Do not overcook them at this stage because they’ll continue cooking in the oven.

Transfer the shrimp to a plate.

Step 4: Make the Creamy Sauce

Reduce the skillet heat to medium-low.

Add the remaining 2 tablespoons of butter.

Add the softened cream cheese and heavy cream.

Whisk gently until the cream cheese melts into the cream and creates a smooth sauce.

Add the Parmesan and ½ cup mozzarella.

Continue stirring until the cheese melts.

If using garlic, add it now and cook for about 30 seconds.

Step 5: Season the Sauce

Stir in the salt.

For a less strict carnivore version, add black pepper and seafood seasoning.

Taste carefully before adding additional salt because crab, Parmesan, and seafood seasoning can already contain plenty of sodium.

Step 6: Add the Seafood

Gently fold the cooked shrimp and crab meat into the creamy cheese sauce.

Stir carefully so the crab remains in tender pieces instead of breaking apart completely.

Step 7: Transfer to the Baking Dish

Pour the seafood mixture into the prepared baking dish.

Spread it evenly.

Sprinkle the remaining mozzarella and Parmesan over the top.

For an especially rich finish, drizzle a little melted butter over the cheese.

Step 8: Bake

Place the casserole in the preheated oven.

Bake for approximately 15–20 minutes, or until the casserole is hot and bubbling around the edges and the seafood reaches 145°F (63°C).

For a golden cheese topping, broil for 1–2 minutes at the end.

Watch carefully while broiling.

Step 9: Rest and Serve

Remove the casserole from the oven and let it rest for 5 minutes.

This gives the creamy sauce time to settle slightly.

Serve warm with extra Parmesan or melted butter if desired.

💡 Tips for the Best Seafood Casserole
Don’t Overcook the Shrimp

Shrimp cook quickly. Sauté them only until nearly done before transferring them to the casserole.

Drain the Crab Well

Excess liquid can make the casserole watery.

Gently press the crab in a fine-mesh strainer if necessary before adding it to the sauce.

Use Lump Crab Meat

Lump crab gives you larger, tender pieces throughout the casserole and creates a much more luxurious texture.

Soften the Cream Cheese

Room-temperature cream cheese blends much more smoothly into the sauce.

Freshly Grated Parmesan Melts Better

Fresh Parmesan creates a smoother sauce than many pre-shredded varieties.

Don’t Skip the Resting Time

Allowing the casserole to rest for a few minutes makes it easier to serve and helps the creamy sauce thicken slightly.

🧈 Delicious Variations
Extra-Cheesy Seafood Casserole

Add another ½ cup mozzarella to the topping for an especially gooey casserole.

Butter-Loaded Carnivore Version

Add another tablespoon or two of butter to the finished casserole just before serving.

Shrimp-Only Casserole

Skip the crab and use 1½ pounds of shrimp.

Crab-Heavy Version

Use 12 ounces crab meat and 12 ounces shrimp for an especially seafood-forward casserole.

Spicy Seafood Casserole

For a less strict low-carb version, add cayenne pepper or crushed red pepper flakes.

Garlic Parmesan Seafood Bake

Add an additional clove of garlic and a little extra Parmesan for a stronger garlic-Parmesan flavor.

🍽️ What to Serve With It

For a strict carnivore-style meal, serve it with:

Butter
Fried eggs
Crispy bacon
Additional cheese
A simple seafood side

For a less strict low-carb meal, try:

Roasted asparagus
Steamed broccoli
Cauliflower mash
Zucchini noodles
Green salad
Roasted cauliflower

The creamy sauce is particularly delicious spooned over cauliflower mash.

🥡 Storage Instructions
Refrigerator

Allow leftovers to cool before transferring them to an airtight container.

Refrigerate for up to 3–4 days.

Freezer

Creamy seafood casseroles can change texture after freezing, so refrigeration is preferred.

If freezing, cool completely and store in airtight freezer-safe containers for up to 1 month for best quality.

Thaw overnight in the refrigerator.

Reheating

Reheat gently in a covered skillet over low heat or in the microwave using short intervals.

Avoid overheating, as shrimp can become rubbery.

📊 Approximate Nutrition Information

Per serving, based on 6 servings:

Calories: 500
Protein: 40g
Fat: 36g
Total Carbohydrates: 5g
Fiber: 0g
Net Carbs: 5g

Nutrition values are approximate and will vary depending on the type of crab, shrimp, cream cheese, heavy cream, and cheese used.

❓ Frequently Asked Questions

Is this casserole carnivore?

It can be made carnivore-friendly using shrimp, crab, butter, cream cheese, heavy cream, Parmesan, mozzarella, and salt.

However, definitions of a strict carnivore diet vary, especially regarding dairy and seasonings, so adjust the recipe according to your preferred approach.

Can I use frozen shrimp?

Yes. Thaw the shrimp completely and pat them very dry before cooking.

Excess water can make the casserole watery.

Can I use imitation crab?

You can, but imitation crab typically contains starches, sugars, and other ingredients, so it isn’t suitable for a strict carnivore or very-low-carb version.

Real crab meat is the better choice for this recipe.

Can I use canned crab?

Yes. Canned lump crab works well.

Drain it thoroughly and check carefully for shell fragments.

What cheese goes best with shrimp and crab?

Mozzarella provides excellent meltability, while Parmesan adds a salty, savory flavor.

Provolone or Monterey Jack can also work beautifully.

Can I make this casserole ahead of time?

Yes. Assemble the casserole, cover it, and refrigerate for up to 24 hours.

Bake when ready, adding a few extra minutes if the casserole is very cold.

For the best seafood texture, don’t assemble it several days in advance.

Can I use only shrimp?

Absolutely. Replace the crab with additional shrimp.

The casserole will still be rich, creamy, and delicious.

How do I keep the casserole from becoming watery?

The most important steps are thoroughly draining the crab, patting the shrimp dry, and avoiding overcooking the seafood.

Also allow the finished casserole to rest for a few minutes before serving.

What temperature should seafood reach?

Cook shrimp and crab-containing dishes until the seafood reaches 145°F (63°C).

💚 Final Thoughts

This Creamy Carnivore Shrimp & Crab Cream Casserole is rich, buttery, cheesy, and wonderfully comforting.

The tender shrimp and sweet crab are surrounded by a creamy Parmesan sauce, while melted mozzarella creates that irresistible golden layer across the top.

It’s an easy way to turn simple seafood into a dinner that feels special without needing pasta, breadcrumbs, or a complicated list of ingredients.

Whether you’re making it for a cozy weekend dinner or simply craving something extra cheesy and satisfying, this casserole brings plenty of seafood comfort to the table.