Kake Soba (Hot Soba Noodle Soup)

4.88 from 8 votes
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20 minutes
Servings 2 servings
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If you’re looking for a hot soba recipe, try this classic kake soba! It’s a simple Japanese noodle soup with a light soy sauce–based broth. I’ll show you how to make it step by step and share topping ideas you can enjoy.

Looking for simple soba recipes? Try my Soba Noodle Salad or Cold Soba Noodles!

a bowl of soba noodle soup with chopsticks.

Featured Comment

From Wayne: “I found your recipe very useful, especially the suggestions for condiments.”

Why You Will Love This Recipe 

  • Kake soba is a simple and comforting noodle dish.
  • This is an authentic Japanese soba noodle soup made with classic ingredients.
  • You’ll find easy and versatile topping ideas to customize your bowl.

Recipe Ingredients

You’ll need the following ingredients to make this Hot Soba Recipe:

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ingredients for soba noodle soup.
  • Soba noodles: You can use any regular soba noodles from the supermarket. If you’re looking for gluten-free soba, choose soba made with 100% buckwheat flour. For more details, check out my soba noodles guide.
  • Mentsuyu (noodle soup): This recipe uses homemade mentsuyu, a simple dashi-based soup made with dashi, mirin, and soy sauce. To save time, you can also use store-bought mentsuyu.
  • Toppings: In this recipe, I use scallions and dried wakame seaweed, which are simple and classic choices. For more ideas, check out the topping variations section to find other options you might enjoy.

For Vegans:

Mentsuyu contains fish (bonito flakes), but it can be easily substituted with kombu dashi. Check out how to make the vegan version in this Vegan Soba Noodle Soup.

How To Make Kake Soba: STEP BY STEP 

Here’s a quick visual guide! Check the recipe card below for the video and full details!

How to make kake soba.

Step 1

Prepare toppings.

How to make kake soba.

Step 2

Put mentsuyu and water in a medium saucepan and warm it up.

How to make kake soba.

Step 3

Cook soba noodles according to the package instructions and drain.

How to make kake soba.

Step 4

In a bowl, assemble soba noodles, mentsuyu, and toppings.

Kake Soba (Japanese Simple Soba Noodle Soup)

Serve and enjoy right away, as soba noodles quickly absorb the soup and can become soggy if left too long. If you like a little heat, sprinkle with shichimi togarashi (spice blend) before eating.

Recipe Tips

  • For the best results, cook the soba noodles separately from the soup. Cooking them together can make the broth cloudy and dilute the flavor.
  • After cooking, briefly rinse the soba noodles with water to remove excess starch. This helps improve the texture and keeps the noodles from becoming sticky.
  • If the soup tastes too salty, dilute it with a little water. If it tastes too mild, add more mentsuyu or a bit of salt until the flavor is just right.

Topping Variations

This is the fun part! Many ingredients pair well with kake soba. Below, I’ve listed classic and popular toppings that are easy to prepare at home.

Toppings for Kake Soba (Japanese Simple Soba Noodle Soup)
  • Green onions (scallions)
  • Wakame seaweed
  • Kamaboko (fish cake)
  • Onsen tamago (A softly cooked egg with a creamy yolk.)
  • Agedama (Crispy bits of tempura batter)
  • Spinach
  • Tororo kombu (Thin flakes of kombu seaweed)
  • Aburaage (Thin, deep-fried tofu)

Your Questions Answered

What is soba broth made of?

Soba broth is typically made from dashi, soy sauce, and mirin. It has a light, savory flavor that pairs well with simple soba noodles.

What does “kake” mean in kake soba?

“Kake” means to pour over. Kake soba refers to soba noodles served in hot broth poured over the noodles, with simple toppings.

Do you drink the soba noodle broth?

Yes, you can drink the broth. It’s light and flavorful, but feel free to enjoy as much or as little as you like.

Why did my soba noodles turn soggy?

Soba noodles absorb broth quickly. If they sit too long in the soup, they can become soft and soggy, so it’s best to serve and eat hot soba right away.

If you have more questions, feel free to leave a comment below!

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Kake Soba (Hot Soba Noodle Soup)

4.88 from 8 votes
Prep: 10 minutes
Cook: 10 minutes
Total: 20 minutes
Servings: 2 servings
Author: Juri Austin
If you’re looking for a hot soba recipe, try this classic kake soba! It’s a simple Japanese noodle soup with a light soy sauce–based broth. I’ll show you how to make it step by step and share topping ideas you can enjoy.
Kake soba noodle soup served in a bowl.

Equipment

  • Medium saucepan
  • Strainer

Ingredients
  

  • 2 servings Soba Noodles
  • 1 Tbsp Dried Wakame Seaweed
  • ¼ Scallion
  • 600 ml Homemade Mentsuyu
  • 200 ml Water

Instructions
 

  1. Prepare the toppings: Place the dried wakame in a small bowl and let it soak for about 5 minutes. Drain the seaweed completely. Finely chop the scallion.
  2. Make the soba soup: Put mentsuyu and water in a mediium saucepan and warm it up.
  3. Boil the soba noodles: While warming the soup, add the soba noodles to a separate pot of boiling water and cook according to the package instructions. Stir the noodles with chopsticks to separate them while cooking.
  4. Drain the noodles: Drain using a strainer and quickly rinse under running cold water to remove the extra starch.
  5. Serve: Serve the drained noodles in a bowl, pour the soup, and place the scallions and wakame on top.

Notes

  • For the best results, cook the soba noodles separately from the soup. Cooking them together can make the broth cloudy and dilute the flavor.
  • After cooking, briefly rinse the soba noodles with water to remove excess starch. This helps improve the texture and keeps the noodles from becoming sticky.
  • If the soup tastes too salty, dilute it with a little water. If it tastes too mild, add more mentsuyu or a bit of salt until the flavor is just right.
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Video

Nutrition

Serving: 1servingCalories: 383kcalCarbohydrates: 72.3gProtein: 22.4g

This nutritional information is estimated and provided for general reference only.

Course: Noodles
Cuisine: Japanese
Keyword: kake soba

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Juri Austin

Hi! I’m Juri, founder of Chef JA Cooks and the creator and photographer of this site. I’m here to guide you in authentic yet easy-to-follow Japanese recipes! Let’s explore the world of Japanese cuisine together!

4.88 from 8 votes (6 ratings without comment)

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4 Comments

  1. 4 stars
    Thank you Chef Ja, my first visit to your website. I found your recipe very useful especially suggestions for condiments.

    Yoroshiku, Wayne