Keto Alfredo Sauce


Rich, creamy and packed with flavor

This velvety smooth Keto Alfredo Sauce is so easy to make, uses only a handful of ingredients, and is loaded with creamy, rich flavor.

It’s no secret that homemade sauces are better for you than jarred ones, but sometimes convenience wins. But it doesn’t get easier than this low carb alfredo sauce recipe. In less than 15 minutes, with only 5 ingredients, you’ll have a rich and creamy white sauce that’s super low in carbs and perfect to pour over top of shirataki noodles or hearts of palm pasta.

A white and bamboo plate filled with fettucine alfredo nearby ground parmesan and a garlic bulb.

Other keto alfredo sauce recipes use cream cheese as a shortcut, which adds an extra 3 grams of carbohydrates per quarter cup. This ultra-low carb recipe uses egg yolks, whipping cream, and butter to create a thick, rich and creamy sauce.

How to make keto alfredo sauce

  1. Sauté butter and minced garlic. Add a pinch of nutmeg for extra flavor.
  2. Whisk the egg yolk into heavy whipping cream, then pour it into the garlic butter mixture.
  3. Cook while stirring for 5-10 minutes or until the sauce has thickened enough to coat the back of a spoon.
  4. Add parmesan cheese and noodles to the thick and creamy alfredo sauce.
  5. Stir in noodles. To make keto chicken alfredo, add sliced chicken.

A fork holding noodles over a plate of rich creamy pasta.

Key ingredients & substitutions

  • Butter – Use salted or unsalted butter; however, unsalted butter you can control the saltiness of the sauce. You can always add more salt at the end if it’s needed. Parmesan cheese also adds salty flavor to this keto alfredo sauce recipe.
  • Garlic – If you can’t get your hands on fresh, jarred minced will work, but fresh garlic will have a much stronger flavor.
  • Egg yolk – This sauce uses only egg yolks as a thickener for a rich and creamy sauce. But don’t throw out the egg whites. Save them for your next breakfast scramble or to make meringues!
  • Heavy whipping cream – If you use a lighter dairy like half and half or milk, your sauce won’t have the same creaminess. Heavy whipping cream is the perfect thickness for a luxurious alfredo. And substituting with a nut milk (almond milk or coconut milk) won’t get your sauce thick and creamy.
  • Parmesan cheese – A necessary ingredient in alfredo sauce; however, other hard cheeses like Parmigiano-Reggiano cheese, Pecorino Romano, Grana Padano or Pecorino can be used.
  • Nutmeg – Just a small amount of nutmeg adds a warm and nutty flavor that complements this comforting chicken pasta, but it can be left out if you don’t have it.

Keto Alfredo Sauce Recipe Video

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Keto Alfredo Sauce Ingredients

  • 2 tablespoons butter
  • 2 cloves garlic, minced
  • Pinch nutmeg, optional
  • 1 egg yolk
  • 1 ½ cups heavy whipping cream
  • 1 cup grated parmesan cheese

Keto Alfredo Sauce Directions

  • Keto Alfredo Sauce
  • A plate of fettucine alfredo with a fork scooping up pasta.

    Keto noodles to serve with alfredo

    For a low carb pasta dish, you’ll need to find a noodle alternative. Thankfully, there are so many delicious options to choose from; the hardest part is deciding on your favorite!

    A fork sitting in creamy fettucine topped with pepper and chopped parsley.

    What store bought alfredo sauce is keto?

    While this recipe is an easy alfredo sauce that’s keto-approved, I get that there’s not always enough time in the day to whip up your own sauce from scratch. When time is short, try one of these jarred keto alfredo sauces:

    Parmesan cheese

    Traditional alfredo is a simple white sauce made from butter, heavy cream, and parmesan cheese. The parmesan adds umami and salty flavors to the sauce.

    Although I did use it in this recipe, pre-grated cheese may not melt as easily and can give your sauce a gritty texture because of anti-caking agents. For the creamiest, most flavorful sauce use freshly grated parmesan cheese.

    Storage information & meal prep instructions

    This keto alfredo sauce recipe can be made up several days ahead of time making it the perfect sauce for meal prep.

    If you have extras, you can store it in the refrigerator for 3-5 days. To reheat the sauce, add it to a small pot over low-medium heat and warm, whisking continuously until warmed through. Add an extra splash of heavy cream if the sauce needs to be slightly thinned.

    It’s not recommended to freeze alfredo sauce as it may become grainy when thawed.

    Keto Alfredo Sauce: FAQS

    Can I substitute nut milk for heavy cream?

    For this alfredo sauce, nut milk won’t give you the thick and creamy texture that heavy cream will. To use nut milk, you’ll need to add a thickener such as arrowroot powder or cream cheese.

    Is alfredo sauce keto?

    Alfredo sauce is typically low carb and possibly keto unless it’s made with flour or added sweeteners.

    What can you replace if you don’t have heavy cream?

    A keto replacement that works for many recipes is full-fat coconut milk. It’s high in fat, low in carbs, and will add creamy thickness to your recipes. Just keep in mind that the flavor will be a bit different and may not work for every recipe.

    Nutritional information & Macros

    Nutrition Information

    Keto Alfredo Sauce

    Servings: 6

    Amount Per Serving
    Calories 337
    Fat 32.4g
    Protein 4.4g
    Total Carbs 1.6g
    Net Carbs 1.6g

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      1. If it boils, it can break. Just have patience and heat it over medium low heat until it thickens the back of the spoon. It can take 5-10 minutes depending on your heat source.

    1. This was the easiest and best tasting Alfredo Sauce. I just shredded chicken and added to the sauce no noodles at all. It was delicious. Thank you so much for this recipe.

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