Today I’m sharing a recipe for keto seafood alfredo that you can make in under 30 minutes.

This dish is creamy, satisfying, and loaded with protein from the seafood. The alfredo sauce is made from scratch with just heavy cream, butter, and parmesan cheese.
No complicated ingredients or special cooking skills needed. If you can boil water and stir a pan, you can make this recipe.
The great thing about this recipe is that you can use whatever seafood you like or have available. Shrimp works beautifully and cooks quickly.

Scallops give you a sweet, tender texture. Calamari adds a nice chew. You can use just one type or mix different kinds together. I’ve made this with all shrimp, all scallops, and various combinations, and it always turns out delicious.
👍 Why You’ll Love This Recipe
Only 5 Ingredients Needed: This recipe uses just five main ingredients – seafood, butter, heavy cream, parmesan cheese, and some basic seasonings.
That’s it. You don’t TO spend money on ingredients you’ll only use once. Everything in this recipe is something you can use for other keto meals too.
Perfect Macros for Keto: This recipe hits all the right numbers for anyone following a keto diet. It’s very low in carbs, and most of that comes from the small amount of naturally occurring lactose in the cream and cheese.

That’s low enough to fit into even a strict keto plan where you’re keeping carbs under 20 grams per day.
Works With Any Seafood: This recipe is super flexible when it comes to what seafood you use.
The recipe suggests shrimp, scallops, calamari, and shellfish, but you can really use whatever you like or whatever is available at your store.
✨ Recipe Ingredients
- 1 pound (450g) Seafood (shrimp, scallops, calamari, shellfish- or a mix)
- 2 tablespoons Butter (1tbsp for seafood + 1 tbsp for sauce)
- 1/2 cup Heavy Whipping Cream
- 1/4 cup Parmesan Cheese (grated) (try this grated parmesan – amazon link, it’s excellent)
- Black Pepper
- Salt
👨🍳 How To Make
Follow this easy recipe:

Step 1
Start by cooking the seafood. Bring a pan to medium-high heat, pat the seafood dry, add butter to the pan, and then add the seafood. Cook for about 7-10 minutes.
Step 2
Melt butter in another pan on medium-low heat. Once it melts, add the cream and bring it to a simmer.
Step 3
Simmer for 5-8 minutes until the volume is reduced by about 1/2.

Step 4
Add the Parmesan cheese, black pepper, and salt. Mix well.
Step 5
Combine the sauce and seafood and mix well. Yummy!

💡Tips
1. Keep the Sauce Heat Low
When you’re making the alfredo sauce, resist the urge to turn up the heat to make it go faster. High heat can cause the cream to break, which means the fat separates from the liquid and you end up with a greasy, curdled mess instead of a smooth creamy sauce.
Medium-low heat is what you want. The cream should be gently bubbling, not rapidly boiling. It might feel like it’s taking forever, but this slow simmer is what makes the sauce come out silky and smooth.

The low heat also gives the cream time to reduce properly and thicken up. If you rush it with high heat, the cream might reduce too quickly on the outside but stay thin in the middle, or worse, it could scorch on the bottom of the pan.
A burnt cream smell is not what you want in your alfredo. Just be patient and let it simmer gently.
2. Use a Mix of Seafood if You Can
While you can definitely make this recipe with just one type of seafood, using a combination gives you different textures and flavors in every bite.
Shrimp brings a sweet, firm texture. Scallops are buttery and tender. Calamari adds a pleasant chewiness. When you mix them together, each forkful is a little different and more interesting.

3. Add the Cheese Off the Heat
Once your cream has reduced and thickened, take the pan off the burner before you add the parmesan cheese.
This prevents the cheese from getting stringy or clumping up. Cheese can seize up when it hits very hot liquid, turning into rubbery little balls instead of melting smoothly into the sauce.
By removing the pan from the heat first, the cream cools down just slightly – it’s still hot, but not screaming hot.

You’ll Love These Recipes Too
Check out these low carb recipes too:
FAQ
What can I serve this with?
This dish is rich and filling enough to eat on its own without any sides. The combination of protein from the seafood and fat from the cream makes it very satisfying.
However, if you want to serve something alongside it, a simple green salad is perfect. Just some lettuce, cucumber, and tomato with oil and vinegar dressing complements the creamy richness without adding many carbs.
Keto Seafood Alfredo
Print RecipeIngredients
- 1 pound 450g Seafood (shrimp, scallops, calamari, shellfish- or a mix)
- 2 tablespoons Butter 1tbsp for seafood + 1 tbsp for sauce
- 1/2 cup Heavy Whipping Cream
- 1/4 cup Parmesan Cheese grated (try this grated parmesan – amazon link, it’s excellent)
- Black Pepper
- Salt
Instructions
- Start by cooking the seafood. Bring a pan to medium-high heat, pat the seafood dry, add butter to the pan, and then add the seafood. Cook for about 7-10 minutes.
- Melt butter in another pan on medium-low heat. Once it melts, add the cream and bring it to a simmer.
- Simmer for 5-8 minutes until the volume is reduced by about 1/2.
- Add the Parmesan cheese, black pepper, and salt. Mix well.
- Combine the sauce and seafood and mix well. Yummy!
Made this last night and WOW! I was skeptical about skipping the pasta but honestly didn’t miss it at all.