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This keto alfredo sauce recipe is the best way to satisfy comfort food cravings in minutes! Unlike some store-bought sauces, this one is naturally low carb and keto, without any unusual ingredients or thickeners, like cornstarch. Serve this easy low carb alfredo sauce recipe with all your favorite keto pasta alternatives, pair with conventional pasta for non-keto eaters at the table, or serve it with my very favorite — keto egg noodles!

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What Is Alfredo Sauce?

Unlike traditional red sauces, alfredo is a cream sauce traditionally made with butter, parmesan cheese, and spices. Store-bought sauces may also contain thickeners (such as flour or cornstarch), vegetable oils, or other added ingredients to keep them shelf-stable.

Why You’ll Love This Easy Keto Alfredo Sauce Recipe

  • Rich, cheesy flavor
  • Creamy texture
  • Uses basic keto staples
  • Ready in 10 minutes
  • Just 2.8g net carbs per (generous!) serving
  • Perfect on ANY pasta, keto or not!
Keto alfredo sauce in a small pitcher.

Low Carb Alfredo Sauce Ingredients

This section explains how to choose the best ingredients for quick and easy alfredo sauce, what each one does in the recipe, and substitution options. For measurements, see the recipe card below.

  • Butter – I use grass-fed butter here, but any unsalted variety will work.
  • Garlic – This keto garlic alfredo sauce doesn’t skimp on garlic! I use 6 cloves here, but feel free to reduce the amount if you want less garlic. It’s also fine to substitute garlic powder (use 3/4 teaspoon in place of the 6 cloves).
  • Heavy Cream – This adds richness to the sauce while keeping it pourable. If you need an alternative and don’t mind the flavor, you can also substitute full-fat canned coconut milk. I don’t recommend almond milk, as the final sauce will be too thin.
  • Grated Parmesan Cheese – This adds flavor and thickens the alfredo sauce. Grate it fresh if possible, or use a pre-grated kind. Shredded parm should also work, but might take longer to melt. As an alternative, cream cheese can act as a thickener, but the flavor is completely different, so I don’t really recommend it unless you want a more tangy cream sauce.
  • Sea Salt & Black Pepper – You’ll want to add a little more than you think you’ll need, since the sauce will mellow out after mixing with ingredients like pasta or vegetables. If you don’t like the appearance of black pepper in your sauce, use white pepper instead.
  • Nutmeg – It’s a classic ingredient for any easy alfredo sauce recipe, but you can omit it if you like.
Keto alfredo sauce ingredients.

How To Make Alfredo Sauce From Scratch

This section shows how to make low carb keto alfredo sauce, with step-by-step photos and details about the technique. For full instructions, see the recipe card below.

  • Saute. Add butter to a medium saucepan over medium heat. Add garlic and saute until fragrant, about 30 seconds.
  • Simmer. Add heavy cream, bring the sauce to a gentle simmer, and continue simmering until sauce thickens and reduces by roughly 1/3. The larger your saucepan, the faster it will reduce.
Sauteed minced garlic in a saucepan.

Low carb alfredo sauce ingredients in a saucepan.

  • Thicken. Reduce heat and gradually whisk in parmesan cheese until smooth. Add spices to taste and adjust sauce for thickness. (Add cream if sauce is too thick, or add additional cheese if sauce is too thin.)
Finished homemade alfredo sauce in a saucepan.

Frequently Asked Questions

No need to complicate this sauce! Get answers to all your questions here.

How To Thicken Alfredo Sauce?

This alfredo sauce recipe contains no thickeners, because it thickens naturally from the cheese, unlike other jarred sauces that rely on starches or flour. If you do wish to thicken the sauce more without adding substantial carbs, you can add more grated parmesan to your liking, or try a keto friendly cornstarch substitute.

Is Alfredo Sauce Keto?

Yes, with many high-fat ingredients and minimal carbohydrates, alfredo is naturally keto friendly. Some varieties (especially store-bought ones) contain extra ingredients that increase the carb count, so check labels and recipes to know exact macros.

Is Alfredo Sauce Gluten-Free?

Traditional alfredo is naturally gluten-free, and even store-bought sauces often avoid using gluten. Always check labels to be certain, though!

How Many Carbs In Alfredo Sauce?

This alfredo sauce recipe has 2.8g net carbs per 1/4 cup serving. Carbs in alfredo sauce at the store or at restaurants can vary widely, depending on what is in them.

Keto friendly alfredo sauce close up, with parsley on top.

Storage Instructions

Store this easy keto alfredo sauce recipe in a covered container in the fridge for up to 1 week.

Can You Freeze Alfredo Sauce?

Yes, you can freeze homemade alfredo sauce. Transfer it to an airtight container (ideally a freezer bag) and freeze for 2-3 months. It may be lumpy after thawing, but follow the reheating instructions to fix this.

Reheating Instructions:

If frozen, thaw in the refrigerator overnight or reheat directly from frozen. Reheat on the stovetop or microwave at low power until warm, stirring often to break up any lumps. If it’s still not smooth, you can give it a quick blend.

Since this sauce thickens during storage, you can thin it out with a little more cream as needed when you reheat it.

Keto pasta with low carb alfredo sauce.

What To Make With Alfredo Sauce

Now that you know how to make easy alfredo sauce with heavy cream, you probably need ideas for ways to use it. Here are some recipes you can pair with this sauce, with no wheat-based noodles whatsoever!

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Reader Favorite Recipes

The recipe card is below! Readers that made this also viewed these recipes:

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Low Carb Keto Alfredo Sauce Recipe (Easy!)

This easy keto alfredo sauce recipe needs just 4 simple ingredients and 10 minutes! Plus, homemade low carb alfredo sauce is creamy, rich, and tastes much better than the jarred ones.

Cook: 10 minutes

Total: 10 minutes

Servings: 6 (adjust to scale recipe)

Recipe Video

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Ingredients

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Instructions

Tap on the times in the instructions below to start a kitchen timer while you cook.

  1. Melt butter in a medium saucepan over medium heat. Add minced garlic and saute for about 30 seconds, until fragrant.

  2. Add the heavy cream. Bring to a gentle simmer, then continue to simmer for about 5 minutes, until it begins to thicken and volume is reduced by about 1/3. (Amount of time will vary depending on the size of your saucepan.)

  3. Reduce heat to low. Gradually whisk in the Parmesan cheese. Keep whisking over low heat, until smooth. If using nutmeg, sea salt, and/or black pepper, stir those in, to taste. (If sauce is thicker than you like, you can thin it out with more cream.)

Nutrition Facts

Amount per serving. Serving size in recipe notes above.

Calories 261

Fat 25.9g

Protein 5g

Total Carbs 2.9g

Net Carbs 2.8g

Fiber 0.1g

Sugar 1.9g

Nutrition facts are provided as a courtesy. Have questions about calculations or why you got a different result? Please see our nutrition policy.

© Copyright Maya Krampf for Wholesome Yum. Please DO NOT SCREENSHOT OR COPY/PASTE recipes to social media or websites. We’d LOVE for you to share a link with photo instead. 🙂

Keto alfredo sauce recipe pin.