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Low-Carb Alfredo Sauce

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Growing up in an Italian family, pasta has always been my ultimate comfort food. For the ultimate indulgence, it was Alfredo pasta, topped off with a rich, creamy sauce.

But instead of regular pasta, you can serve this creamy low-carb cheese sauce with keto-friendly options such as shirataki noodles or zucchini noodles!

This recipe below is for a basic gluten-free Alfredo sauce, but I’m also giving you some tips on how best to serve it, along with some flavour variations to mix things up a bit.

  • In terms of cooking the sauce, it’s really simple and comes together in minutes. The cheese added in at the end not only adds flavour but also will help thicken up the sauce. Make sure you don’t scrimp here, and use the best quality Parmesan you can find/afford, and grate it fresh before adding.
  • The sauce will thicken further if you leave it a few minutes before serving. Note however that this sauce does not have any thickeners, and therefore it is on the runnier side. To thicken further, add more parmesan, and/or cream cheese (see notes below).
  • If not serving straight away, store the sauce separately from the pasta/zoodles (or however you wish to serve it), and then when reheating do so over a low heat, whisking to combine and avoid separation. Alternatively, give the sauce a quick blitz using a hand blender.
  • Alfredo sauce can be frozen, but it may separate when reheating. This can affect the flavour and texture, so I would always recommend to make it fresh and in smaller quantities rather than freezing.

Alfredo Sauce Variations

  • Herbed — add in a tsp of dried Italian herbs at step 2, or stir through 2 tablespoons of pesto at the end.
  • Smokey — add 1/2 tsp smoked paprika at step 2. Serve on shirataki noodles topped with sliced fried chorizo for a smoky sausage pasta.
  • Thick & creamy — add 40 g/ 1.4 oz cream cheese at step 1 — this will thicken the sauce further and create a creamier texture.
  • Browned butter — In step 1, add the butter first, and cook over medium heat, swirling in the pan, until starting to turn an amber colour. Reduce to low heat, whisk in the cream, and then continue with the rest of the recipe.
  • Also make sure to try our Keto Cheese Sauce which is made with cheddar instead of Parmesan, and additionally includes cream cheese!

Hands-on Overall

Serving size about 1/4 cup/ 60 ml

Allergy information for Low-Carb Alfredo Sauce

✔  Gluten free
✔  Egg free
✔  Nut free
✔  Nightshade free
✔  Pork free
✔  Avocado free
✔  Coconut free
✔  Fish free
✔  Shellfish free
✔  Beef free

Nutritional values (per serving, about 1/4 cup/ 60 ml)

Net carbs1.7 grams
Protein5.7 grams
Fat28.9 grams
Calories290 kcal
Calories from carbs 2%, protein 8%, fat 90%
Total carbs1.7 gramsFiber0 gramsSugars1.2 gramsSaturated fat18.2 gramsSodium424 mg(18% RDA)Magnesium9 mg(2% RDA)Potassium50 mg(2% EMR)

Ingredients (makes 6 servings)

  • 1/3 cup butter (75 g/ 2.7 oz)
  • 1 cup heavy cream (240 ml/ 8 fl oz)
  • 1/2 tsp garlic powder
  • 1/2 tsp sea salt
  • 1/4 tsp freshly ground pepper
  • 3/4 cup + 2 tbsp grated Parmesan cheese or Pecorino Romano or other Italian hard cheese (80 g/ 2.8 oz)


  1. Finely grate the Parmesan cheese. (You can use Pecorino Romano or other Italian hard cheese.) Low-Carb Alfredo Sauce
  2. Add the butter and cream to a large saucepan over low heat. Simmer, stirring, for 3 minutes.
    Low-Carb Alfredo Sauce
  3. Whisk in the garlic, salt, and pepper, and then the grated Parmesan cheese. Low-Carb Alfredo Sauce
  4. Cook until melted and the sauce has thickened slightly.
    Low-Carb Alfredo Sauce
  5. Allow to sit 2-3 minutes before serving to allow sauce to thicken further.
    Low-Carb Alfredo Sauce
  6. Enjoy over zoodles, grilled meat, fish and cooked vegetables.
    Low-Carb Alfredo Sauce
  7. The sauce is best enjoyed fresh but can be stored in the fridge for up to 5 days. To serve, reheat over a low heat, whisking to combine and avoid separation. Low-Carb Alfredo Sauce

Ingredient nutritional breakdown (per serving, about 1/4 cup/ 60 ml)

Net carbsProteinFatCalories
Butter, unsalted, grass-fed
0 g0.1 g10.2 g90 kcal
Cream, heavy whipping, pouring, full-fat (30-40% fat)
1 g0.8 g15.2 g146 kcal
Garlic powder, spices
0.2 g0 g0 g1 kcal
Salt, sea salt
0 g0 g0 g0 kcal
Pepper, black, spices
0 g0 g0 g0 kcal
Parmesan cheese
0.4 g4.8 g3.4 g52 kcal
Total per serving, about 1/4 cup/ 60 ml
1.7 g5.7 g28.9 g290 kcal

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Dearna Bond
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Dearna Bond

Dearna is a passionate foodie and food photographer, and loves sharing her knowledge and enthusiasm for both via her food blog and online photography courses.

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