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Low Carb Fideo

Traditional Sopa de fideo (aka Mexican noodle soup) is a soup made with noodles, onion, a tomato-based sauce and chicken broth. One of the great things about Sopa de fideo however, is that it is so versatile!  Finding a substitute for the noodles was the main key to modifying fideo to be low carb fideo. In the recipe below we used shirataki noodles for the fideo and no one blinked at a loss of flavor.

low carb fideo
Low Carb Sopa de Fideo (Mexican Noodle Soup)

** Note: This is a guest post from my daughter Tesla**

What is Fideo?

The word fideo refers to the noodles used in the soup. Typically they are a shorter, skinnier version of spaghetti.

Fideo is often referred to as “Mexican baby food” or as the original Mexican ramen.  However, my first experience with fideo was in Spain while I was volunteering at a school for 1-4 year olds.  Guess what they served the babies?! Fideo, por su puesto. (Fideo, of course).

Traditional Fideo vs. Low Carb Fideo

Even though my parents have not tasted the comfort food that is fideo, I wanted to be able to share in the comfort with them- but sans carbs (carb is a four-letter word at HeathGlen!).  So I set out to find a low carb fideo noodle. 

This is when I happened upon the shirataki noodle made from mushrooms (*note: the recipe used shirataki noodles made from tofu since that is what my mom found at her grocery store). The shirataki noodle is very low in carbs and has no sugar.  

With traditional fideo you crisp the noodles first by a light fry or sauté.  The directions on the shirataki noodle package instruct you to rinse and drain and then dry fry the noodles. In the recipe below, I did not cook the shirataki noodles ahead of time. I simply rinsed them and allowed them to drain while cooking the soup ingredients. I then added them to the heated pot and cooked them slightly with the tomato base before adding the water.

I was curious if shirataki noodles would stand up to that method of cooking and was pleasantly surprised that they did.  Even though slightly less crunchy, the shirataki noodles didn’t soak up all the liquid like regular fideo noodles do, which I was also happy about.

Ideas for Additions to Low Carb Fideo

Sopa de fideo is really simple and extremely flexible. You can add meat or fish or make it vegetarian. A variety of different vegetables or beans can be added. During tomato season, fresh heirloom tomatoes can be used instead of canned tomatoes (*note: make sure and add tomato paste if using canned tomatoes). Many different seasoning blends can be used in the soup, from spicy to mild. Fideo is a definite plus to add to your weeknight recipe repertoire!

Other Low Carb Mexican Recipes

For a range of wonderful, tested Mexican recipes that have been modified to be low carb or keto, click here.

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Low Carb Sopa de Fideo

Course Soup
Cuisine Mexican
Keyword low carb fideo
Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Servings 6
Calories 65kcal
Author Tesla Stainbrook


  • 8 oz shirataki noodles
  • 2 Tbsp olive oil
  • 1 large onion chopped
  • 2-5 cloves garlic mashed and then minced
  • 2 10 oz cans Rotel diced tomatoes with green chiles
  • 2 Tbsp tomato paste
  • 5-6 cups water
  • 2 tsp chicken bouillon base I use Better Than Bouillon
  • 3/4 tsp salt or to taste
  • 2 med limes optional


  • Empty shirataki package of noodles into a strainer, rinse and let sit while preparing the broth.  
  • In a large pot or dutch oven, heat 2 Tbsp oil over med-high heat.  Add chopped onion and saute for 5-8 minutes until caramelized.  Add garlic and stir in for 30 seconds.
  • Add the 2 cans of diced tomatoes and 2 Tbsp tomato paste.  Stir together.  Add drained shirataki noodles and stir into the tomato base for a minute or two.  Add water to cover (5-6 cups) and 2 tsp bouillon base and salt to taste.
  • Bring mixture to a boil and then reduce heat and simmer soup for 10-15 minutes or until heated through.  I took my plastic spatula and cut the noodles while they were simmering.  Alternatively you could leave them long or cut them ahead of time. 
  • Serve with lime squeezes and a cold beverage.  Buen Provecho!


Calories: 65kcal | Carbohydrates: 4g | Protein: 1g | Fat: 4g | Sugar: 1g

Recipe Notes:

  1. I typically like to prepare all my mis en place (each ingredient in separate little bowls) first.  I like onion, so I didn’t dice too finely- I just cut the onion in fourths and used my mandolin to slice the onion but you can dice as finely/ coarsely as you prefer. The noodles I used had instructions to rinse and fry before use, but I didn’t fry the noodles first before using them in this recipe- just rinsed and let them drain out while I was completing the next steps.  
  2. Traditional fideo is shorter noodles, so you could cut them before adding to the pot, or while cooking in the pot for a more authentic experience. 
  3. Add pre-cooked meat and other vegetables, if using, before covering with water. Depending on the type of vegetables you add, this may require simmering for a longer time.
  4. Add salt and bouillon to taste. I like 1 tsp salt and 2 tsp bouillon.
  5. Serve with lime and a cold beverage!

¡Buen Provecho!

Online Coaching Available:

I have followed the slow carb diet for 2 years, the keto diet for 1 year and now I currently do a nuanced version of the best of both including a 16/8 intermittent fasting protocol.  I have put my “been there done that” knowledge to work helping people figure it out and customize the approach that works for them.  I am currently an online fitness coach (info can be found here if you’re interested), and have just hit the 325-client mark.  Come and visit me and see if online coaching might be for you!

If not for diet or exercise, there are other coaches on the site that coach anything from writing a blog, to getting up early, to getting rid of that pesky procrastination.  Explore the site while you are there.  There are some wonderful coaches and the testimonials will tell you what you need to know.  Click here to get to my profile and then explore others from there.

1 Comment

  1. Susan Metoxen on April 11, 2019 at 11:54 am

    It’s great to find noodles without adding carbs!

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