Keto Recipes

The Best 5-Ingredient Keto Alfredo Sauce (Homemade and Creamy)

By Bree

If you’re looking for a creamy, comforting and incredibly easy keto alfredo sauce, give this 5-ingredient alfredo sauce recipe a try!

This creamy keto alfredo sauce is so easy to make and is SO GOOD.

If you’re not familiar with alfredo sauce, it’s a white sauce that is served with pasta. Since the keto diet doesn’t allow for wheat-based pasta, you have the option of serving this with keto-approved pasta alternatives like shirataki noodles, spaghetti squash or zucchini noodles. You could also check out my 2-ingredient recipe for low carb noodles if you’re looking for something that isn’t vegetable-based.

How to Make Low Carb Keto Alfredo Sauce

This homemade keto alfredo sauce has quickly become my new favorite. It’s rich, it’s creamy, and it’s made with keto-friendly ingredients. What’s not to love?

  • Melt the butter. Melt butter in a medium saucepan over medium heat.
  • Cook. Add the garlic and cook for 30 seconds.
  • Simmer. Add in the heavy cream and simmer for 5 minutes.
  • Finish cooking. Add in the Parmesan cheese and stir constantly until it’s well incorporated. Keep cooking the sauce until it has thickened to your liking.
  • Seasoning. Add the chopped parsley and mix to combine before seasoning to taste with salt and black pepper.

Keto Alfredo Sauce

Keto Alfredo Sauce

What Makes This Homemade Keto-friendly Alfredo Sauce So Healthy?

Besides the fact that it tastes fantastic, there are a few more reasons why you should consider making your own keto alfredo sauce with this recipe:

  • Relieves inflammation. Chronic inflammation in the body can lead to the development of numerous types of diseases. (1) Foods like garlic are high in anti-inflammatory compounds that help to relieve inflammation within the body.
  • Provides antioxidants. Garlic and parsley are both rich in disease-fighting antioxidants that help to protect against the damage caused by harmful free radicals.
  • High quality fats. This recipe uses both butter and heavy cream, both of which provide you with a solid amount of high quality saturated fats. Bonus points if you use grass-fed butter, which contains higher amounts of omega-3 fatty acids, vitamin E, and other antioxidants. (2)

Keto Alfredo Sauce

Low Carb Keto Pasta Options to Pair with Your Alfredo Sauce

There are plenty of low carb pasta alternatives to try with your pasta sauces. For this keto-feiendly alfredo sauce, I find that it goes well with:

Keto Alfredo Sauce

How to Store Homemade Alfredo Sauce

Depending on how long you want to hold onto your leftover alfredo sauce, you can either freeze or refrigerate it. Whatever you decide on, the most important thing to do with either option is to allow the keto alfredo sauce to cool completely first.

Once it has cooled off, store the sauce in an airtight container or a mason jar to either refrigerate or freeze.

For best results, I would recommend keeping it in the fridge and trying to consume it before it goes bad (3-5 days due to the heavy cream content). If you decide to freeze it, be prepared to risk losing some texture and consistency when you thaw it out (once again, due to the heavy cream).

Why is My Alfredo Sauce Lumpy?

Make sure to constantly stir your sauce as it cooks. If you leave it, it’s likely to curdle, which is what causes that lumpy texture. Alfredo sauce should be smooth like cream.

(You may also like: Keto Chicken Alfredo Bake with Broccoli and Bacon)


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Keto Alfredo Sauce

The Best 5-Ingredient Keto Alfredo Sauce (Homemade and Creamy)

  • Author: Bree -
  • Prep Time: 2 minutes
  • Cook Time: 7 minutes
  • Total Time: 9 minutes
  • Yield: 4 1x
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¼ cup butter

1 cup heavy cream

1 clove garlic, minced

1 ½ cups freshly grated Parmesan cheese

¼ cup chopped fresh parsley


  1. Melt the butter in a medium saucepan over medium heat. 
  2. Add the garlic and cook for 30 seconds. 
  3. Add the cream and simmer for 5 minutes. 
  4. Add the Parmesan cheese and stir constantly until well incorporated. 
  5. Cook the sauce until it’s thickened to your liking. 
  6. Add the chopped parsley and mix to combine. 
  7. Season to taste with salt and black pepper.


  • Serving Size: 1
  • Calories: 329
  • Carbohydrates: 2.1 g
  • Fat: 30.5 g
  • Sugar: 1.2 g
  • Protein: 12.4 g

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I’ve tried a few other keto-approved alfredo sauce recipes that are honestly quite good as well. I took inspiration from them and made my own, but feel free to try them out anyway:

More Keto Pasta Recipes to Try:

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