Mentsuyu is a versatile Japanese noodle sauce that brings a rich, savory umami to many dishes. It balances sweet and salty notes and works as both a concentrated soup base and a dipping sauce.
This homemade mentsuyu recipe is simple and flavorful, and it’s a great staple to keep in your pantry. When stored in an airtight container in the refrigerator, the concentrated sauce will keep for up to four weeks, making it convenient for quick Japanese-style meals. Use it as a base for hot noodle soups, a dipping sauce for chilled noodles, or as a dip for tempura.
If you enjoy Japanese cooking, making mentsuyu at home allows you to adjust the flavor to your taste and avoid preservatives or additives often found in commercial bottles.
In this post:
- What is mentsuyu?
- Ingredients and substitutes
- How to make mentsuyu
- How to use mentsuyu
- Frequently asked questions
- Mentsuyu sauce recipe
What is mentsuyu?
Mentsuyu is a concentrated Japanese stock commonly used in noodle dishes such as kake udon and zaru soba. The classic base is awase dashi—a broth made from kombu (dried kelp) and katsuobushi (dried bonito flakes)—combined with soy sauce, sake, and mirin. The result is a deeply flavored liquid that is both savory and slightly sweet.
Variants of tsuyu exist across Japanese cuisine: tentsuyu refers to tempura dipping sauce, while tsuyu is a general term for these concentrated soup bases. Mentsuyu specifically is often used for noodle soups and cold noodle dipping sauces, but its uses extend to marinades, hot pots, and stir-fries.
Making mentsuyu at home is straightforward and gives you control over saltiness, sweetness, and the intensity of the dashi flavor.
Ingredients and substitutes
Homemade mentsuyu needs only a handful of pantry ingredients and a few minutes to prepare:
- Sake – Adds depth and a subtle savory note. Use cooking sake or drinking sake. If you don’t have sake, Chinese rice wine or dry sherry can substitute.
- Mirin – A sweet rice wine that brings gentle sweetness and roundness. If unavailable, add a bit more sake and a touch of sugar to taste.
- Soy sauce – The primary savory component. Use regular all-purpose or light soy sauce. For a gluten-free option, use tamari.
- Kombu – Dried kelp adds mineral-rich umami and rounds out the dashi base.
- Katsuobushi – Dried bonito flakes provide smoky, fishy umami. For a vegetarian or vegan version, rehydrated dried shiitake mushrooms make an excellent substitute.
These ingredients are commonly found at Asian groceries and many mainstream supermarkets.
Quick option: If you need mentsuyu fast, use a teaspoon of dashi powder in place of kombu and katsuobushi. Mix with the liquid ingredients—no simmering or straining required.
You can also make mentsuyu from prepared dashi stock (awase dashi or kombu dashi). The flavor will be slightly less concentrated, but you can compensate by using less water when diluting.
How to make mentsuyu
Gather the ingredients and follow these simple steps. This recipe yields just over 1 cup of concentrated mentsuyu, enough to make approximately four cups of noodle broth or three cups of dipping sauce once diluted.
- ¼ cup sake
- ½ cup mirin
- ½ cup soy sauce
- One 2-inch (5 cm) square of kombu
- One heaped cup katsuobushi (dried bonito flakes)
Step 1: In a small saucepan, bring the sake to a gentle boil over medium heat and cook for a few seconds to let some alcohol evaporate.
Step 2: Add mirin, soy sauce, kombu, and katsuobushi. Bring to a gentle simmer, then reduce heat to low and simmer for 5 minutes.
Step 3: Remove the pan from heat and let the liquid cool for at least 5 minutes. Strain through a fine mesh sieve to remove kombu and katsuobushi, then transfer the clear concentrated mentsuyu to a clean jar.
Tip: Don’t discard the spent kombu and katsuobushi. Chop them finely and mix with a little toasted sesame oil and chili flakes for a savory condiment, or use them to make homemade furikake-style seasoning.
Store the mentsuyu in an airtight container in the refrigerator for up to four weeks.
How to use mentsuyu
This recipe produces a concentrated mentsuyu. Before serving, dilute it with water according to the application and your taste preferences:
- Noodle soup base: For hot noodle soups like udon or soba, start with 1 part mentsuyu to 3 parts hot water. Adjust to taste and pour over cooked noodles. Garnish with sliced green onions and optional proteins.
- Cold dipping sauce: For chilled soba or somen, begin with 1 part mentsuyu to 2 parts ice-cold water and adjust to your preferred strength. Serve with cucumber, nori, and scallions if desired.
- Tempura dipping sauce: Mix equal parts mentsuyu and water and add a pinch of sugar to balance the flavor for tempura dipping.
- Hot pots and marinades: Use diluted mentsuyu as a flavorful hot pot broth or as a marinade for fish and meats. It also enhances stir-fries and dressings in small amounts.
Frequently asked questions
Mentsuyu is a concentrated Japanese soup base typically made from dashi (kombu and bonito flakes), soy sauce, mirin, and sake. Some versions include a touch of sugar. Regional and family recipes vary.
Tsuyu is a general term for Japanese soup bases; mentsuyu specifically refers to the concentrated noodle soup base made from dashi, soy sauce, mirin, and sake.
Use mentsuyu diluted as a hot noodle broth, a cold dipping sauce for soba or somen, a dip for tempura, or as a seasoning or marinade in other dishes.
Mentsuyu (Japanese Noodle Soup Base)
Ingredients
- ¼ cup sake
- ½ cup mirin
- ½ cup soy sauce
- One 2-inch square of kombu (dried kombu kelp)
- One heaped cup katsuobushi (dried bonito flakes)
Instructions
- In a small saucepan, bring the sake to a gentle boil for a few seconds to evaporate some alcohol.
- Add mirin, soy sauce, kombu, and katsuobushi. Bring to a gentle simmer, then reduce heat and maintain a low simmer for 5 minutes.
- Remove the pan from heat and let the mixture cool for at least 5 minutes.
- Strain through a fine mesh sieve to remove kombu and bonito flakes. Transfer the clear mentsuyu to a clean jar.
- Refrigerate in an airtight container for up to 4 weeks.
Notes
- Vegan option: Replace katsuobushi with 3 rehydrated dried shiitake mushrooms. Rinse the mushrooms, soak them in water for about an hour, then use them in place of bonito flakes.
- Quick version: Use 1 teaspoon dashi powder instead of kombu and katsuobushi. Mix with the liquid ingredients—no simmering or straining needed.
- Dilution guide: For cold dipping sauce, start with 1 part mentsuyu to 2 parts cold water. For hot noodle soup, start with 1 part mentsuyu to 3 parts hot water and adjust to taste.
- Reuse spent ingredients: Keep the strained kombu and bonito flakes in an airtight container for up to a week in the fridge or freeze for up to a month. Chop and mix with sesame oil and chili flakes for a flavorful condiment.
Nutrition Information
Other Japanese sauce ideas
- Sukiyaki-style sauce for hot pots
- Goma dare (sesame sauce)
- Okonomiyaki sauce for savory pancakes
- Yakisoba sauce for stir-fried noodles
- Miso-based all-purpose sauce