If you miss pasta on keto, zucchini noodle alfredo is about to become your new best friend. Spiralized zucchini stands in for fettuccine and gets tossed in a velvety sauce of butter, garlic, heavy cream, and freshly grated parmesan cheese. The whole thing comes together in about 20 minutes, making it one of the fastest vegetarian keto dinners you can prepare on a busy weeknight. With only 4g net carbs per serving, it is remarkably close to the real thing in both taste and satisfaction. The key is cooking the zucchini noodles just right — tender but still with a bit of bite — so they hold the rich alfredo sauce beautifully.

Why This Works on Keto

Zucchini is one of the lowest-carb vegetables available, with roughly 2g net carbs per 100g. Swapping it for traditional pasta eliminates 40+ grams of carbs per serving in one move. The alfredo sauce is naturally keto — butter, cream, and parmesan are all high in fat and very low in carbohydrates. This dish hits 28g of fat per serving, keeping you satisfied and in ketosis without any effort.

Ingredients

  • 4 medium zucchini (about 700g total)
  • 45g butter
  • 4 cloves garlic, minced
  • 180ml heavy cream
  • 60g parmesan cheese, freshly grated
  • 1g ground nutmeg
  • Salt and black pepper to taste
  • Fresh parsley, chopped, for garnish

Instructions

  1. Spiralize the zucchini into noodles using a spiralizer or julienne peeler. If you prefer, you can use a vegetable peeler to create wide ribbon-like noodles. Pat the zucchini noodles dry with paper towels to remove excess moisture.
  2. Melt the butter in a large skillet over medium heat. Add the minced garlic and cook for 30-45 seconds until fragrant but not browned.
  3. Pour in the heavy cream and bring to a gentle simmer. Cook for 3-4 minutes, stirring occasionally, until the sauce thickens slightly.
  4. Add the grated parmesan cheese and whisk until the sauce is smooth and the cheese has melted completely. Stir in the nutmeg and season with salt and pepper.
  5. Add the zucchini noodles to the pan and toss gently with tongs to coat them evenly in the sauce. Cook for 2-3 minutes until the noodles are just tender but still have a slight bite.
  6. Serve immediately, garnished with chopped parsley and an extra grating of parmesan if desired.

Tips & Variations

  • Avoid soggy noodles: The biggest mistake is overcooking. Zucchini releases water quickly, so 2-3 minutes in the sauce is all you need. Salting and draining the noodles for 10 minutes beforehand also helps.
  • Add protein: Toss in sauteed mushrooms or halloumi cubes for extra substance.
  • Extra garlic: For garlic lovers, roast a whole head of garlic and squeeze the soft cloves into the sauce for a mellow, sweet garlic flavour.
  • Different noodles: Yellow squash or a mix of yellow squash and zucchini adds visual interest and tastes equally good.
Can I make zucchini noodles ahead of time?
You can spiralize the zucchini up to a day ahead and store the raw noodles in the fridge wrapped in paper towels inside a container. Do not cook them until you are ready to serve, as they will become mushy if left sitting in sauce.
Do I need a spiralizer?
A spiralizer gives the best noodle shape, but it is not essential. A julienne peeler creates thinner strips, and a regular vegetable peeler makes wider ribbons similar to pappardelle. All three options work well with this alfredo sauce.
Why are my zucchini noodles watery?
Zucchini has a high water content that releases during cooking. To prevent a watery dish, pat the raw noodles very dry before cooking, do not overcrowd the pan, and cook over medium-high heat for just 2-3 minutes. You can also salt the raw noodles and let them drain in a colander for 10-15 minutes before cooking.