Japanese Soy Mirin Mushroom Marinade

Name: Japanese Soy Mirin Mushroom Marinade
Prep time: 10 min
Cook time: 5 min
Total time: 15 min
Yield: 4 servings
Cuisine: Japanese
Ingredients: ½ cup (120 ml) soy sauce (shoyu); ¼ cup (60 ml) mirin (sweet rice wine); ¼ cup (60 ml) sake or dry rice wine; 6 oz (170 g) fresh shiitake mushrooms, cleaned, stems discarded, caps halved or quartered if large; 3 (12 g) garlic cloves, smashed and minced; 1 teaspoon (4 g) sugar; ¼ cup (60 ml) water; 1 (20 g) green onion (scallion), white and light green parts, thinly sliced; 1 teaspoon (5 ml) toasted sesame oil (optional); red chili flakes (togarashi or shichimi), to taste (optional)

From the MyKitchenBank Kitchen

A rich, umami-forward Japanese marinade infused with tender marinated shiitake mushrooms, mirin's subtle sweetness, and aromatic garlic. The mushrooms soften in the liquid, absorbing the savory soy and sake flavors while releasing their own depth. Use this marinade to coat grilled meats, tofu, or vegetables, or serve the mushrooms and sauce as a condiment or topping over rice or grilled items.

Prep: 10 min
Cook: 5 min
Wait: 3 hr
Total: 3 hr 15 min
Makes: 1 cup (240 ml) marinade with mushrooms

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Steps

Before you start

Clean shiitake mushrooms with a damp cloth or soft brush; do not soak them
Measure all liquid ingredients before you start cooking
Have a glass jar or container ready for marinating

1
Heat the base liquid
- In a small saucepan over medium heat, combine the soy sauce, mirin, sake, water, and sugar.
- Stir well to dissolve the sugar, about 1 minute.
- Bring to a gentle simmer—you'll see small bubbles break the surface.
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Ready when: Mixture comes to a gentle simmer with small bubbles breaking the surface
Tip: Do not let it boil hard; you want to preserve the sake and mirin's delicate flavors.
2
Add mushrooms and garlic
- Add the minced garlic to the simmering liquid and stir.
- Immediately add the halved shiitake mushroom pieces.
- Stir gently to coat all the mushrooms in the liquid.
- Return to a bare simmer and cook uncovered for 5 minutes, stirring once or twice.
- The mushrooms will soften and begin to release their juices.
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Ready when: Mushrooms are tender and the liquid smells fragrant with garlic and soy
Tip: Keep the heat low so the mirin does not caramelize or burn on the bottom.
3
Cool the marinade
- Remove the saucepan from the heat.
- Stir in the sliced scallion and toasted sesame oil if using.
- Let the mixture cool to room temperature, about 30 minutes, stirring occasionally to encourage even cooling.
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Ready when: Mixture is no longer steaming and feels cool to the touch
Tip: Cooling allows the delicate aromatics to integrate without evaporating away.
4
Transfer and marinate
- Pour the cooled marinade and mushrooms into a clean glass jar or container.
- Season to taste with red chili flakes if you like heat.
- Cover and refrigerate for at least 3 hours, preferably overnight, so the mushrooms fully absorb the savory liquid and flavors deepen.
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Ready when: Mushrooms are dark, tender, and fully infused with umami flavor
Tip: The longer this sits, the richer and more complex the flavor becomes—day two is even better than day one.

Good to know

Tips

This marinade works beautifully brushed on grilled chicken, fish, or vegetables during the last minute of cooking, or spooned over steamed rice or noodles as a finishing sauce.
For a thicker glaze, simmer the strained marinade (without the mushrooms) on medium-low heat for 2–3 minutes until it coats the back of a spoon lightly.
The mushrooms themselves are delicious served warm or at room temperature as a side dish or appetizer, drizzled with a little extra sesame oil and a sprinkle of nori or sesame seeds.
Mirin and sake contain alcohol; the initial simmer removes most of it, but a small amount may remain. If you need this completely alcohol-free, substitute the mirin with honey and use additional soy sauce instead of sake.

Make ahead

Prepare this marinade 1 or 2 days ahead. It actually improves in flavor as it sits. Store in the refrigerator in a covered container or jar.

Storage & reheating

Refrigerate in a covered glass jar or airtight container for up to 2 weeks. The mushrooms will continue to soften and flavors will deepen over time. Freezer: Freeze in a freezer-safe jar (leaving 1 inch headspace) for up to 3 months; thaw in the refrigerator before using. The frozen mushrooms will be softer when thawed, but the marinade and flavor remain excellent.

Substitutions

fresh shiitake mushrooms → cremini, oyster, or king trumpet mushrooms. Other mushrooms work but shiitake gives the most authentic umami depth. Use similar weights and adjust cooking time if mushrooms are much larger or smaller (large mushrooms may need 6–7 minutes).
sake or dry rice wine → dry white wine or Chinese rice wine (shaoxing). Sake's subtle sweetness is ideal, but dry white wine or shaoxing wine work in a pinch. If using shaoxing, reduce to 3 tablespoons because it is more assertive.
mirin (sweet rice wine) → honey or agave syrup mixed with a splash of rice vinegar. Use 2 tablespoons honey or agave plus 1 tablespoon rice vinegar to approximate mirin's balance of sweetness and acid. True mirin gives a silkier mouthfeel.
green onion (scallion) → fresh ginger, minced, or a few drops of yuzu or lemon juice. Scallion adds fresh bite; ginger adds warmth; citrus adds brightness. Choose based on what you're serving the marinade with.