Published September 25, 2026
Zucchini noodles are a quick keto alternative to pasta when the sauce is the main attraction. Shirataki noodles hold a noodle-like shape with a different, springier bite. Spaghetti squash is another lower-carb option, but its carbohydrate content per serving is higher than the other two, so portion size matters if you follow a strict keto target.
By Jon Simon, editor and food historian, creating food content since 2020. About the author.
Quick answer
Zucchini noodles: 1 cup prepared for 1 cup cooked pasta. Spiralize zucchini and warm it briefly; overcooking releases water. It is especially useful under pesto, meat sauce or a cream sauce served immediately.
3 pasta substitutes that work
| Swap | Ratio | Best for | Suits |
|---|---|---|---|
| Zucchini noodles | 1 cup prepared for 1 cup cooked pasta | Quick sauced bowls | Vegetarian, Vegan, Dairy-free, Egg-free, Gluten-free, Keto |
| Shirataki noodles | 1 cup prepared for 1 cup cooked pasta | Stir-fries and saucy bowls | Vegetarian, Vegan, Dairy-free, Egg-free, Gluten-free, Keto |
| Spaghetti squash | 1 cup cooked strands for 1 cup cooked pasta | Baked dishes and tomato sauce | Vegetarian, Vegan, Dairy-free, Egg-free, Gluten-free |
Zucchini noodles
1 cup prepared for 1 cup cooked pasta. Spiralize zucchini and warm it briefly; overcooking releases water. It is especially useful under pesto, meat sauce, or a cream sauce served immediately.
Shirataki noodles
1 cup prepared for 1 cup cooked pasta. Rinse well, drain, and dry-fry before saucing. The springy texture differs from wheat pasta; check the specific pack for added starch and allergens.
Spaghetti squash
1 cup cooked strands for 1 cup cooked pasta. Roast until tender and pull into strands with a fork. It is mildly sweet and softer than noodles; keep the portion modest if following a strict carb limit.
How to choose
Match the swap to the sauce. Toss zucchini noodles briefly in a hot pan so they stay firm and don’t water down a cream sauce. Rinse and dry-fry shirataki according to the package before adding sauce. Roast spaghetti squash and scrape strands only after it is tender.
What to watch for
These are plate-volume substitutions, not dry-pasta cooking ratios. None releases starch like wheat pasta, so a sauce that relies on pasta water may need another method. Check shirataki labels because flavored or premixed products can add starch or allergens.
Independent references
American Diabetes Association healthy swaps; American Diabetes Association non-starchy vegetables
Missing something else?
Browse the low-carb substitute lookup
Allergy note: product formulas vary, so check the label of every substitute you buy for allergens.
Medical Disclaimer: The nutritional information and diabetic-friendly adaptations provided in this article are for informational purposes only. While we strive for accuracy, we are culinary experts, not medical doctors. Individual responses to foods vary, so always consult your healthcare provider or registered dietitian about dietary changes, especially if you’re managing diabetes or other health conditions. Always monitor your blood sugar as your healthcare team recommends.
