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Keto Alfredo sauce is an easy cheesy sauce for your favorite meats, veggies, seafood, or pasta. It’s a low-carb version of a classic sauce that will make you rethink ever getting canned Alfredo sauce again.

A bowl of Keto Alfredo Sauce with a spoon, alongside cherry tomatoes, parsley, and a wedge of parmesan cheese on a gray surface.


One of our favorite indulgences is Alfredo sauce. Rich, creamy, full of cheese this keto-friendly sauce adds tons of flavor to so many different dishes and you don’t need to worry about carbs.

Alfredo sauce is naturally high in fat, making it perfect for keto dieters. At 3 grams of carbs per 1/3 cup, this decadent cheese sauce is irresistible.

Ingredients for making Keto Alfredo Sauce, including shredded cheese, butter, garlic, and a jug of milk.

Ingredients You’ll Need

  • Butter– Unsalted butter will allow you to better control the taste but you can use salted if that’s what you have.
  • Garlic– A little bit of garlic adds the classic flavor.
  • Heavy Cream – Don’t try to substitute half and half or milk for heavy cream. Both of those have higher sugar content and will make the sauce low carb, but not necessarily keto friendly. They also tend to make the sauce thinner.
  • Parmesan – Using fresh, real Parmesan is extremely important. It is what gives this cheesy sauce its great flavor. It is also what thickens the sauce so that we can avoid any starchy thickeners.
  • Ground nutmeg – Ground nutmeg adds a nice, subtle flavor to the alfredo sauce and helps make the sauce delicious.
  • Salt & Pepper – Parmesan cheese is pretty salty on it’s own so you may or may not need to add any salt. give it a taste and see what you think! Start with 1/4 teaspoon of black pepper and add more as needed.
A bowl of creamy Keto Alfredo Sauce surrounded by ingredients like tomatoes, garlic, parsley, and cheese on a gray textured surface.

How to Make It

This recipe is about as easy as it comes. It’s great for a quick sauce on a busy weeknight.

Step 1 – Prep the cream and butter. Warm up your cream to room temperature (approximately 70 degrees) in a small saucepan or in a microwave-safe bowl. Once the cream is warmed, melt the butter in a small pot. Saute the garlic for about 1 minute or until it becomes fragrant. Next, pour in the warmed milk and bring the pot to a simmer.

Step 2 – Add the cheese. Mix in the Parmesan cheese and nutmeg. Stir the pot frequently as you allow it to cook for about 8 to 10 minutes. Once the sauce has started to thicken, add in the salt and pepper to taste. Serve the sauce hot over your favorite meats, veggies, or seafood or mix it into you favorite low carb or regular pasta.

Frequently Asked Questions

Why Do You Warm the Heavy Cream?

Cold cream can separate if added to heat when cold. You should warm it gently either on the stovetop over low heat, or for a few seconds in the microwave to bring it to room temp (approximately 70 degrees). Using room temperature cream will help prevent separation.

How to Store Alfredo Sauce

Allow the sauce to cool completely. Once it has come to room temperature, pour or spoon into an airtight container. You can refrigerate the sauce for up to 4 days or freeze for up to 1 month.

Can You Freeze Alfredo Sauce?

Yes!  Before freezing, cool the sauce on the counter and then place it in a freezer-safe container or bag. You can freeze it for up to 1 month.

When ready to use the sauce, thaw it in the refrigerator overnight. Heat the sauce slowly over medium-low heat, stirring continuously until the sauce has warmed through. If the sauce begins to separate simply add a bit more heavy cream and whisk it together as it heats. That should pull the sauce back together.

My Sauce Didn’t Thicken What Should I Do?

Check your cheese. It’s important that you make sure you use real, fresh, Parmesan cheese that you buy in a block and then grate. Using a store bought powdered cheese or pre-shredded Parmesan cheese is often the reason the sauce doesn’t thicken. You need to cheese to melt into the cream to help give it a thicker consistency.

If you’ve used fresh Parmesan, and it still isn’t thick, you may need to allow it to simmer a little longer, letting some of the liquid evaporate as it cooks.

Finally, if all else fails, you can add some shredded mozzarella to the sauce which will thicken it.

A bowl of creamy Keto Alfredo Sauce with a spoon, surrounded by cherry tomatoes, parsley, black pepper, and a block of parmesan cheese.

What to Serve With Keto Alfredo Sauce

You can serve our Keto Alfredo Sauce with Our Low Carb Shrimp Alfredo or with our Low Carb Alfredo Zucchini Lasagna.  We add mozzarella cheese to it and make this delicious Keto Chicken Alfredo Casserole and Keto Chicken and Broccoli Alfredo. We even added it to bell peppers to make these awesome Keto Chicken Alfredo Stuffed Peppers.

Missing pasta? You have to try our Keto Cajun Chicken Alfredo made with heart of palm noodles (or your favorite keto-friendly pasta).

It’s also a great way to turn our Keto Pizza Casserole into a white pizza, just sub out the pizza sauce for the Alfredo sauce.

It’s delicious poured over roasted vegetable and chicken or pork of any kind. It would be delicious with our Prosciutto Wrapped Chicken or our Prosciutto and Provolone Stuffed Pork Loin.

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Servings: 6
Prep Time: 5 minutes
Cook Time: 15 minutes
Total Time: 20 minutes

Keto Alfredo Sauce

Keto alfredo sauce is an easy cheesy sauce for your favorite meats, veggies, seafood, or pastas. It’s a low carb version of a classic sauce that will make you rethink ever getting canned alfredo sauce again.
A bowl of Keto Alfredo Sauce with a spoon, alongside cherry tomatoes, parsley, and a wedge of parmesan cheese on a gray surface.
Print Recipe
4.77 from 26 votes


  • 3 tablespoons Butter
  • 2 cloves Garlic, finely minced
  • 2 cups Heavy Cream
  • 5 ounces Parmesan, grated
  • 1/8 teaspoon Ground nutmeg
  • Salt & Pepper to taste


  • Melt 3 tablespoons of butter in a pan. Add garlic to the pan and cook for 1 minute.
  • Pour the heavy cream into the pan and bring it to a simmer over medium heat. Make sure to stir often so the cream doesn’t burn.
  • Stir in the Parmesan and nutmeg and continue to cook until it thickens, approximately 8-10 minutes. You will know it is ready when the sauce is thick enough to coat the back of your spoon.
  • Add salt and pepper to taste.
  • Remove the sauce from the heat and add to your meal or let cool completely if you are saving for later.


Serving: 0.33cup, Calories: 418kcal, Carbohydrates: 3g, Protein: 10g, Fat: 41g, Saturated Fat: 26g, Cholesterol: 140mg, Sodium: 459mg, Potassium: 81mg, Sugar: 1g, Vitamin A: 1526IU, Vitamin C: 1mg, Calcium: 335mg, Iron: 1mg
Nutrition Disclaimer: We are not certified nutritionists. Nutrition facts are an estimate and are provided as a courtesy. They are generated by an online API which recognizes ingredient names and amounts and makes calculations based on the serving size. Results may vary.
Course: Sauce
Cuisine: American
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