Japanese Harusame Noodle Soup

Rain was drumming against my kitchen window last Tuesday when I remembered I had a pack of glass noodles tucked away in the pantry. Something about translucent noodles swimming in hot broth felt like the perfect antidote to a gray afternoon. I ended up making three batches that week.

My Japanese roommate in college taught me that harusame means spring rain, named after how these delicate glass noodles look floating in broth. She would make this when either of us was feeling homesick or overwhelmed by exams. Now whenever I cook it, I can almost hear her laugh mixing with the gentle simmer of the pot.

Ingredients

• 5 cups dashi stock: The foundation of Japanese cooking, but chicken or vegetable broth works beautifully in a pinch
• 2 tbsp soy sauce: Use a good quality brand for that deep umami base
• 1 tbsp mirin: Adds subtle sweetness that balances the salty elements
• 1 tsp sesame oil: Just enough to give the broth a nutty undertone
• 1/2 tsp salt: Start here and adjust to your taste
• 100 g harusame noodles: These mung bean vermicelli become magically translucent when cooked
• 1 medium carrot, julienned: Brings sweetness and gorgeous orange color to the bowl
• 100 g shiitake mushrooms: Their meaty texture makes every spoonful satisfying
• 60 g baby spinach or bok choy: Adds fresh green color and a burst of nutrients
• 1 spring onion: That mild onion bite that brightens everything
• 100 g firm tofu, cubed: Optional but adds protein and silky texture
• 1 tsp toasted sesame seeds: For that final crunch and nutty aroma

Instructions

Build your broth base:

Combine dashi stock, soy sauce, mirin, sesame oil, and salt in a large saucepan over medium heat. Let it come to a gentle simmer, stirring once to blend everything.

Soften the harder vegetables:

Add the julienned carrots and sliced shiitake mushrooms to the simmering broth. Let them cook for about 5 minutes until they start yielding to the tip of a knife.

Add the tofu:

If you are using tofu, gently slide those cubes into the pot and simmer for 2 more minutes. Be careful not to break them apart as they stir.

Prepare the glass noodles:

Place the harusame in a heatproof bowl and cover with boiling water. Let them soak for 4 to 5 minutes until tender but still springy, then drain well.

Wilt the greens:

Drop the spinach or bok choy into the hot broth and cook for just 1 minute. You want them vibrant and wilted, not mushy or gray.

Assemble the bowls:

Divide the drained noodles among four serving bowls, then ladle the hot broth and vegetables over each portion. The steam rising up carries all those wonderful aromas.

Finish with garnish:

Sprinkle toasted sesame seeds and extra sliced spring onion over each bowl. Serve immediately while the noodles are still bouncy and the broth is piping hot.

Save

Last month my sister came over recovering from a nasty cold and I made her this soup. She took one sip, closed her eyes, and said it tasted like comfort itself. Sometimes the simplest bowls hold the most warmth.

Making It Your Own

This soup welcomes endless variations depending on what is in your refrigerator or what you are craving. I have added shredded chicken, swapped spinach for bok choy, and even thrown in enoki mushrooms at the last minute.

The Broth Balance

Getting the seasoning right takes practice and trust in your own taste buds. Start with less soy sauce and salt than you think you need, then add more gradually as the broth simmers.

Perfect Pairings

This light soup works beautifully alongside grilled fish, teriyaki chicken, or a simple cucumber salad. It is substantial enough to stand alone as a quick lunch but gentle enough not to compete with heavier mains.

• Pair with pickled vegetables for a traditional Japanese meal
• Add a soft boiled egg if you want more protein
• Keep extra chili oil on hand for those who like heat

Save

There is something deeply soothing about a bowl of clear broth and slippery noodles. I hope this recipe brings you as many quiet moments of comfort as it has brought me.

Recipe FAQs

→ What are harusame noodles?

Harusame are Japanese glass noodles made from mung bean starch, also known as cellophane noodles or vermicelli. They're naturally gluten-free and become translucent when cooked, with a delicate texture that perfectly absorbs flavorful broths.

→ Can I make this soup vegetarian?

Absolutely. Simply replace the traditional dashi stock (which contains bonito flakes) with a high-quality vegetable broth. The rest of the ingredients are naturally vegetarian, and you can omit the tofu or keep it for added protein.

→ How do I store leftovers?

Store the broth and noodles separately in airtight containers in the refrigerator for up to 2 days. The noodles will continue to absorb liquid, so keeping them apart helps maintain their texture. Reheat the broth gently and combine just before serving.

→ What vegetables work best in this soup?

Carrots, shiitake mushrooms, and leafy greens like spinach or bok choy are traditional choices. You can also add enoki mushrooms, wakame seaweed, snow peas, or shredded cabbage for extra variety and nutrition.

→ Is this soup gluten-free?

Harusame noodles are naturally gluten-free, but always check the packaging for cross-contamination warnings. Use tamari instead of soy sauce and ensure your dashi is certified gluten-free to make the entire dish safe for those avoiding gluten.