Homemade Mentsuyu (Japanese Noodle Soup Base)
めんつゆ
https://japanese-kitchen-brothers.com/pages/recipe-homemade-mentsuyu-japanese-noodle-soup-base
One bottle of soy, mirin, and dashi. Dilute it for soba, tempura, rice bowls, and stews.
👨🍳"This jar lives on my fridge door. Most weeknight dinners start here."
Ingredients
Serves 6Quick tsuyu (Local)
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Umami Soy sauce100 ml (scant ½ cup)
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Water150 ml (⅔ cup)
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Sweet Sugar3 tbsp
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Umami Instant dashi granules1 tsp
Classic tsuyu (Authentic)
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Sweet Hon-mirin100 ml (scant ½ cup)not mirin-style seasoning
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50 ml (3½ tbsp)
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Umami Soy sauce100 ml (scant ½ cup)
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Water100 ml (scant ½ cup)for soaking the kombu
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Umami Kombu5 g (one 5 x 5 cm piece)
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Umami Katsuobushi15 g (about 2 packed cups)
Taste & Texture Profile
The Local tsuyu is sweeter and simpler. It is ready in 10 minutes and works well in stews.
Taste Profile
Texture Profile
Sensory Notes
Soy sauce first, with a light fish note from the granules.
A quick bubble in the pot. The sugar hisses as it melts.
Dark brown and clear, like strong black tea.
Taste it diluted and cold. Warm tsuyu tastes sweeter.
Smoky bonito and toasted rice from the mirin. Kombu adds a sea breeze.
The flakes crackle softly as they sink.
Deep amber with a red glow in the light.
Cold on soba, the bonito smell comes forward.
Instructions
Put the soy sauce, water, sugar, and dashi granules in a pot.
Soak the kombu in 100 ml of water for 30 minutes.
Bring it to a boil. Simmer for 1 minute until the sugar melts. Turn off the heat.
💡 How sugar stands in for mirin
Mirin brings sweetness and a soft, round edge. Three tablespoons of sugar cover the sweet part. It also calms the sharp salt of soy sauce. You lose some rice aroma, not the balance.
I have no mirin at home. Is sugar really okay?
Yes. It does the main job of mirin.
So the missing part is only the aroma.
Boil the mirin and sake in a pot for 1 minute. The sharp alcohol smell fades.
💡 Why we burn off the mirin first
Hon-mirin is about 14 percent alcohol. Mentsuyu is often used cold. Raw alcohol would sting the nose on cold soba. A one-minute boil leaves the sweetness and drops the sting.
Smell the steam. When it stops stinging, you are done.
Does it catch fire like in restaurants?
Sometimes. Keep the lid close and your face back.
Add the soy sauce, the kombu, and its water. Heat until small bubbles appear. Take out the kombu.
Add the bonito flakes. Simmer on low for 1 minute. Turn off the heat and let it cool.
Line a sieve with a paper towel. Pour the tsuyu through. Let it drip. Do not squeeze.
Pour it into a clean bottle. Keep it in the fridge. It tastes best from the next day.
💡 One night turns sharp into round
Fresh tsuyu tastes like soy on top and sweet below. Overnight, the salt and sugar spread out evenly. The flavor feels like one sauce. Old soba shops rest their kaeshi for about 1 week.
I tasted it hot. It felt a bit harsh.
Taste it again tomorrow. It will be different.
So patience is the last ingredient.
Dilute it by use. Dipping 1 to 2. Tempura or agedashi 1 to 3. Stews 1 to 4. Hot noodles 1 to 5.
💡 Why each dish needs a different ratio
Soup you drink tastes right near 1 percent salt. A dip only coats the noodles. So it can be about 2 percent. Wet noodles also thin the dip as you eat.
Tape the chart inside a cabinet door.
Can I not just taste and adjust?
You can. The chart gets you close in one pour.
FAQ
How long does homemade mentsuyu keep?
About 2 weeks in the fridge. Use a clean bottle and a clean spoon. Diluted tsuyu keeps only 2 days.
Can I use these ratios with store-bought mentsuyu?
Only if the label says 3x concentrate. For 2x, use about half the water. Straight tsuyu needs no water.
What can I do with the used bonito flakes?
Stir-fry them dry with sesame seeds. Add a little soy sauce. It makes a quick rice topping.
Can I make mentsuyu gluten-free?
Yes. Use tamari in place of soy sauce. Check the label. Some tamari still has a little wheat.
My noodle soup tastes flat. What went wrong?
It is probably too thin. Try 1 to 4 instead of 1 to 5. Taste it hot, not cold.
