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Low FODMAP Cold Soba Soup with Watercress and Radishes

Low FODMAP Cold Soba Soup

Cold soba soup is a traditional soup and this Low FODMAP Cold Soba Soup is our LOFO take on it. We love this on a hot summer’s night, but it works beautifully for lunch as well. Even though soba are made from wheat flour and buckwheat flour, they have been lab tested and have a low FODMAP serving size, which is detailed in our article All About Asian Noodles & FODMAPs, which we suggest that you read. 

Course: Dinner & Lunch, Soup
Cuisine: American and Asian
Prep Time: 10 minutes
Cook Time: 10 minutes
Total Time: 20 minutes
Makes: 4 Servings
Calories: 205 kcal
Author: Dédé Wilson


  • 8- ounces (225 g) extra-firm tofu, drained
  • 4- ounces (115 g) soba noodles
  • ¼ cup (60 g) frozen, defrosted peas
  • 3 cups (720 ml) Low FODMAP Vegetable Broth, chilled
  • 3 tablespoons low-sodium gluten-free soy sauce
  • 2 tablespoons rice vinegar
  • 1 teaspoon toasted sesame oil
  • 1 teaspoon sugar
  • ½ teaspoon minced fresh ginger
  • 2 cups (160 g) watercress
  • 3- ounces (85 g) white daikon radish, peeled and thinly sliced crosswise, then cut crosswise
  • 2 tablespoons minced scallions, green parts only
  • Sriracha


  1. Cut the tofu block in half lengthwise. Place a triple layer of paper towel on a cutting board, place tofu slabs on top, then cover them with another triple layer of towel. Put something heavy on top, like another cutting board with a heavy pot on top. Allow to sit for about 10 minutes. This technique will remove excess water from the tofu so that it will hold its shape in the salad. Once tofu has drained, discard paper towels and cut tofu into cubes and set aside.
  2. While the tofu is draining, bring a large pot of salted water to a boil over high heat and cook the soba noodles until al dente. Throw the peas in the boiling water, cook for about 10 seconds more, then drain and rinse with cold water; the noodles and peas should be cold. Divide the noodles and peas into 4 soup bowls.
  3. Whisk together the chilled broth, soy sauce, rice vinegar, sesame oil, sugar and ginger until sugar is dissolved. Pour over noodles. Garnish with tofu, watercress, radishes and scallions and serve immediately with Sriracha, which you can use to your tolerance.



FODMAP Information

Our recipes are based on Monash University and FODMAP Friendly science.

  • Daikon: This white radish has been lab tested by Monash and they are low FODMAP in servings of ½ cup (75 g)
  • Ginger: Monash University has lab tested fresh ginger root and has determined it to be free of FODMAPs, making it one of our go-to no FODMAP foods.
  • Sugar: Monash University and FODMAP Friendly have both lab tested white, granulated sugar. Monash states that a Green Light low FODMAP serving size of white sugar is 1/4 cup (50 g). FODMAP Friendly simply states that they have tested 1 tablespoon and that it is low FODMAP. Regular granulated white sugar is sucrose, which is a disaccharide made up of equal parts glucose and fructose. Sucrose is broken down and absorbed efficiently in the small intestine.
  • Watercress: Monash has lab tested watercress and it is low FODMAP in portions of 1 cup (80 g). No Moderate or High FODMAP levels are given.

Please always refer to the Monash University & FODMAP Friendly smartphone apps for the most up-to-date lab tested information. As always, your tolerance is what counts; please eat accordingly. The ultimate goal of the low FODMAP diet is to eat as broadly as possible, without triggering symptoms, for the healthiest microbiome.

Nutrition Facts
Low FODMAP Cold Soba Soup
Amount Per Serving
Calories 205 Calories from Fat 36
% Daily Value*
Fat 4g6%
Saturated Fat 1g5%
Sodium 273mg11%
Potassium 462mg13%
Carbohydrates 31g10%
Fiber 1g4%
Sugar 2g2%
Protein 14g28%
Vitamin A 3775IU76%
Vitamin C 51mg62%
Calcium 152mg15%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.