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Low-Carb Zucchini Noodle Alfredo

4.7 stars, average of 307 ratings

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Low-Carb Zucchini Noodle AlfredoPin itFollow us 148.4k

Pasta. How I miss thee.

I used to joke that I was born in the wrong country, and was sure that I was part Italian. This dish will let you snuggle down with a big cheesy bowl of noodles and eat to your hearts content. You won’t feel stodgy and over loaded like you did after eating pasta, I promise.

What you will feel is ready to go back for seconds. The original Alfredo Sauce recipe was the lowest of low carb sauces EVER.

I don’t know if the Roman restauranteur Alfredo di Lelio, who created it for his pregnant wife, knew that at the time. But excellent work Alfredo.

It consisted of butter and cheese, with a dash of salt. Sadly, it also required fettuccine, but we’ll forgive that. This recipe is a bit different from the original and you won’t find many film stars travelling to my house to eat it, but they would if they had a chance to experience this luscious, yet light version. (If there are any film stars reading this… )


Hands-on Overall

Serving size about 2/3 cup sauce + zoodles

Allergy information for Low-Carb Zucchini Noodle Alfredo

✔  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 2/3 cup sauce + zoodles)

Net carbs7.5 grams
Protein15.3 grams
Fat73.2 grams
Calories743 kcal
Calories from carbs 4%, protein 8%, fat 88%
Total carbs9.1 gramsFiber1.6 gramsSugars7 gramsSaturated fat42.6 gramsSodium540 mg(23% RDA)Magnesium48 mg(12% RDA)Potassium522 mg(26% EMR)

Ingredients (makes 8 servings)

  • 1.2 kg (2.65 lb) zucchini, spiralised - use 1 small 150 g (5.3 oz) zucchini per serving
  • 4 tbsp extra virgin olive oil (1 tbsp for every 2 zucchini/ servings)
Keto Alfredo Sauce:
  • 2 cloves garlic, minced
  • 3/4 cup unsalted butter (170 g/ 6 oz)
  • 1 1/2 pints heavy cream (700 ml)
  • 6 ounces cream cheese (170 g)
  • 6 ounces Parmesan cheese or other Italian hard cheese (170 g)
  • 3/4 cup grated cheddar cheese (85 g/ 3 oz)
  • 1 tsp chopped oregano
  • 1 tbsp chopped basil
  • salt and pepper to taste


  1. Prepare the zucchini noodles using a spiraliser. Low-Carb Zucchini Noodle Alfredo
  2. Place the spiralised zucchini into a colander over the sink. Sprinkle with salt and leave to drain. Low-Carb Zucchini Noodle Alfredo
  3. Add the butter to a pan and melt. Add the garlic and cook gently until soft. Add the cream and bring to a simmer. Low-Carb Zucchini Noodle Alfredo
  4. Add the cream cheese and quarter of the shredded cheeses and stir well until the cheese has completely melted.
  5. Keep adding the shredded cheese in batches until it is all melted and you have a smooth, creamy sauce. It will seem like the cheese will never melt. Don’t get panicked and turn up the heat, just keep up the stirring and I promise it will happen.
  6. Add the herbs and mix through. Take sauce off the heat to sit and thicken slightly. Stir every now and then to stop a skin forming. Low-Carb Zucchini Noodle Alfredo
  7. Pat the zoodles dry with a paper towel. Pour your olive oil into a frypan and heat. Toss zoodles in the oil and sauté very quickly, about 1 or 2 minutes, until just softened. Do not overcook the zoodles or they will become watery and mushy.
  8. Place the zoodles in a large serving dish and toss with the Alfredo sauce. Finish off with some grated parmesan, a sprinkle of black pepper and some fresh basil. Serve immediately, or let the sauce cool down, cover and refrigerate for up to 5 days. Serve with freshly prepared zucchini noodles. Low-Carb Zucchini Noodle Alfredo

Ingredient nutritional breakdown (per serving, about 2/3 cup sauce + zoodles)

Net carbsProteinFatCalories
Zucchini (summer squash, courgette)
3.2 g1.8 g0.5 g26 kcal
Garlic, fresh
0.2 g0 g0 g1 kcal
Butter, unsalted, grass-fed
0 g0.2 g17.3 g153 kcal
Cream, heavy whipping, pouring, full-fat (30-40% fat)
2.3 g1.7 g33.7 g325 kcal
Cream cheese, soft (full-fat)
0.7 g1.5 g6 g52 kcal
Parmesan cheese
0.7 g7.6 g5.5 g83 kcal
Cheddar cheese
0.3 g2.4 g3.5 g43 kcal
Oregano, fresh
0 g0 g0 g0 kcal
Basil, fresh
0 g0 g0 g0 kcal
Salt, pink Himalayan rock salt
0 g0 g0 g0 kcal
Pepper, black, spices
0 g0 g0 g0 kcal
Olive oil, extra virgin
0 g0 g6.8 g60 kcal
Total per serving, about 2/3 cup sauce + zoodles
7.5 g15.3 g73.2 g743 kcal

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Naomi Sherman
Creator of

Naomi Sherman

Naomi is the force behind Naomi Sherman, Food Creative. She is passionate about recipe development, food photography and styling.

An accomplished home cook who was diagnosed with an auto-immune disease eight years ago, Naomi started to explore the connection between healthy, whole food and her symptoms, and a new love was born.

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Comments (19)

Eager to try this recipe!! However, this may be a little too much for me haha! Would this work well if I halved the ingredients? Love this!

Absolutely! Or you can keep the rest for later 😊

What a great recipe!  One of the most delicious and easy to make Alfredo Sauces I've made.  Thank you!

Thank you Suzy!

I tried this last evening but I added some lobster that needed to be used up, it was so good, but very rich, couldn't eat a lot at a time.  Will definately make this again, although I have lots left over this makes a large amount!  
Mary Lou

Lobster sounds like a great addition!

Wow!  I made this recipe this last weekend and it was delicious!   Thank you so much for putting it up here!

Do you have any keto friendly recipes that are a little spicy in nature?

I do indeed: I hope this helps!

Oh my goodness Martina, this Sauce was outstanding! I could have just eaten it with a spoon...but I made Spaghetti Squash noodles for me and Pasta for my husband (?)....we both thought it was a real keeper! Thank you, again!

I agree, this is the perfect recipe for family cooking! I'm glad you enjoyed! 😊

I made this last night and it was so good! Thank you so much. This is the best tasting Alfredo I’ve ever had and it was so easy. I was curious to know if you have the nutritional values for the sauce alone? I use less than what a serving calls for, so I’d like to be able to log the zucchini and sauce separately, if possible. Thanks!

Hi Juli, it the sauce itself is 4.2 g total carbs, 4.1 g net carbs, 13.7 g protein, 66 g fat, and 657 calories per serving. I hope this helps!

Can this recipe be added to the planner?

Hello Leslie, yes, all recipes from our blog can be added to the Planner in our App. You can do that directly from the Blog tab in the recipe on top right (there is an "add" icon. Or you can do that from the Custom Meals tab > KetoDiet blog > search for the recipe name and tap to add. I hope this helps!

Love, love, love Alfredo sauce!  I too miss pasta and am not a big fan of zucchini as a substitute.  I love using kelp noodles (Sea Tangle Konaberry) as they have ZERO taste and provide a neutral base for any sauce. Out of the package, the noodles are oddly crunchy unless they are cooked in an acidic sauce like tomato-based spaghetti sauce or a lemon-based butter sauce.  
I have found a great way to soften the noodles to feel like an authentic pasta without leaving a lemon flavor.  Just soak them in water acidified with cream of tartar!  They should soften in 20-30 minutes or so.  Just rinse and they are ready to be used as a base for "sweeter" sauces like a cheese sauce.

I love kelp noodles! Thank you for the useful tips. I never thought of this and actually because of the crunchy texture I only used them in salads and soups. Good to know! 😊

This was amazing! Well worth the bit of patience required for cheese melting!

Thanks for the recipe - it looks great, as always.
I love the concept of zucchini noodles and they seem like a great alternative even for people who aren't on a low carb diet. But, I have struggled to find recipes that I would truly enjoy. This one seems like it would be well worth trying.