Eel sauce, often called unagi sauce or kabayaki sauce, is a glossy Japanese-style soy glaze traditionally served with grilled eel and rice. This mirin-free version combines soy sauce, brown sugar, water, and a small splash of rice vinegar for a sweet-savory finish without alcohol or specialty ingredients.
Ingredients
- ½ cup (120 ml) soy sauce: Regular soy sauce gives the sauce its salty, savory base. Use reduced-sodium soy sauce if you prefer a milder result; the finished glaze will taste less salty.
- ½ cup (120 ml) water: Water replaces the liquid volume and some of the gentle dilution that mirin provides. It also gives the sugar time to dissolve before the sauce reduces.
- ⅓ cup packed (67 g) light brown sugar: Brown sugar adds sweetness and a light molasses note. For a cleaner, less caramel-like flavor, use the same amount of granulated sugar.
- 1 tablespoon (15 ml) unseasoned rice vinegar: This small amount balances the sweetness. Choose unseasoned vinegar, not seasoned sushi vinegar, which may already contain salt and sugar.
- 1 teaspoon (5 ml) honey, optional: A little honey rounds out the flavor and helps the cooled glaze look shiny. The recipe works without it.
- 1 small strip of kombu, about 1 by 3 inches (2.5 by 7.5 cm), optional: Dried kelp adds a subtle savory depth. Leave it out if you do not have it; the sauce will still be flavorful.
Instructions
- Measure and combine. Add the soy sauce, water, brown sugar, rice vinegar, and optional honey to a small, heavy-bottomed saucepan. Stir until the sugar is evenly wet. If using kombu, place it in the pan now. A small saucepan helps the liquid reduce at a steady pace without spreading into a thin layer that can scorch quickly.
- Warm until the sugar dissolves. Set the pan over medium heat and stir for about 2 minutes, until the mixture is steaming and no gritty sugar remains on the bottom. Do not bring it to a hard boil at this stage. A gentle start helps prevent a sticky ring of sugar from forming around the sides of the pan.
- Simmer and reduce. Lower the heat so the sauce bubbles gently, then simmer uncovered for 12 minutes, stirring every few minutes. Keep the bubbles small rather than vigorous; a hard boil can make the sauce reduce too fast and taste overly salty. If you added kombu, lift it out after about 5 minutes so it does not dominate the flavor. The sauce should look slightly syrupy and coat the back of a spoon, but it will still seem thinner than a finished glaze while hot.
- Check the texture. Remove the pan from the heat after 12 minutes and let the sauce sit for 2 minutes. Dip a spoon in and draw a finger across its back; the line should remain visible briefly. If it runs together immediately, return the pan to low heat for 1 minute, then check again. Avoid reducing it until it looks as thick as syrup in the pan, because it thickens more as it cools.
- Cool before serving or storing. Transfer the sauce to a heatproof bowl or jar and leave it uncovered for 5 minutes, then use it warm or let it cool further. It should be pourable, glossy, and able to cling lightly to food. If it becomes too thick after cooling, stir in water 1 teaspoon (5 ml) at a time until it loosens.
Tips
- Keep the heat gentle. Soy sauce and sugar can scorch if they boil hard, especially near the end of reducing. Use a small burner and stir more often during the final few minutes. If dark flecks appear or the pan smells burnt, do not scrape them into the sauce; a scorched taste is difficult to hide.
- Adjust salt and sweetness after cooling. Hot sauce tastes thinner and can seem sharper than it will once it cools. Taste a cooled spoonful before changing the batch. Add a teaspoon of water if it is too salty, or 1 teaspoon (4 g) sugar dissolved in a little warm water if you want it sweeter.
- Use the right vinegar. Unseasoned rice vinegar provides mild acidity without making the sauce taste strongly sour. Apple cider vinegar can work in a pinch, but use 2 teaspoons (10 ml) rather than a tablespoon because its flavor is more pronounced. Avoid balsamic vinegar, which changes the color and adds a different sweetness.
- Do not rely on a starch shortcut. Reducing the liquid gives the glaze its concentrated soy-and-sugar flavor. Cornstarch can thicken it quickly, but it can make the sauce cloudy or gel-like and does not create the same glossy, clingy texture. If you need a thicker glaze, simmer it a little longer instead.
Serving Suggestions
Brush the sauce over grilled or broiled eel during the last few minutes of cooking, then serve extra at the table. For a simple unagi-style rice bowl, spoon warm sauce over steamed short-grain rice and add sliced cooked eel, scallions, and toasted sesame seeds. The sauce also works as a finishing glaze for salmon, tofu, mushrooms, or roasted eggplant; add it near the end so its sugar does not burn over high heat.
For a quick weeknight plate, drizzle a teaspoon over rice, cooked vegetables, or a sushi bowl rather than pouring it on heavily. It is concentrated and salty, so start with a little and add more to taste. If cooking eel or another fish at home, cook the fish to 145°F (63°C), the USDA FSIS safe minimum internal temperature, checked with a food thermometer. Keep raw fish and its utensils separate from the finished sauce, and do not reuse sauce that has touched uncooked seafood unless you bring it to a full boil first.
Variations
Use a different sweetener: Granulated sugar makes a more straightforward, less rounded sauce. Coconut sugar brings a deeper, earthy flavor and may darken the glaze. Maple syrup can replace the brown sugar by volume, but it adds a noticeable maple aroma and may need an extra minute or two of gentle reduction. Make small changes first; sweeteners do not all reduce in exactly the same way.
Add a ginger note: Simmer one or two thin slices of fresh ginger with the sauce, then remove them before serving. For a warmer, more aromatic version, add a small piece of orange zest and remove it after a few minutes. These are optional flavor directions rather than traditional requirements, and either can make the sauce less neutral as a table condiment.
Make it gluten-free: Replace ordinary soy sauce with gluten-free tamari, checking the label to confirm it is suitable for your needs. Tamari is often a little richer and sometimes saltier, so taste the cooled sauce before adding any extra seasoning. Coconut aminos can also be used, but they are generally sweeter and less salty; reduce the brown sugar to 2 tablespoons (25 g), then adjust after simmering.
Make it closer to a mirin-based glaze: Mirin contributes sweetness, mild acidity, and a fermented aroma, so water and sugar cannot reproduce every part of it. This version stays alcohol-free and straightforward. If you do have sake but not mirin, a common alternative is sake with added sugar; that is a different variation and does not suit cooks avoiding alcohol.
Storage and Reheating
Cool the sauce, transfer it to a clean, covered container, and refrigerate it within 2 hours of cooking. It keeps for 3 to 4 days in the refrigerator. A clean spoon each time helps avoid introducing food particles that can shorten its storage life. Do not store homemade eel sauce at room temperature or attempt to preserve it by canning or jarring for pantry storage.
The sauce may thicken in the refrigerator. Warm only the amount you need in a small saucepan over low heat, stirring frequently, or microwave it in short intervals in a microwave-safe container. If the sauce is being reheated as a leftover, bring it to 165°F (74°C), the USDA FSIS leftover-reheating temperature; check with a food thermometer and stir so it heats evenly. Add a teaspoon of water if it is too thick to pour. For longer storage, freeze it in a tightly sealed, freezer-safe container for up to 2 months for best quality, leaving a little room for expansion. Thaw it in the refrigerator and stir well before using.
Frequently Asked Questions
What is eel sauce made of?
Eel sauce is a sweet-savory Japanese-style glaze commonly made with soy sauce, mirin, sake, and sugar. Recipes vary, and the name does not mean the sauce contains eel. This version uses water, brown sugar, and a little rice vinegar in place of mirin, so it has a similar salty-sweet role without the same fermented aroma.
Can I make eel sauce without mirin and without alcohol?
Yes. The recipe above contains no alcohol: water supplies the liquid, brown sugar supplies sweetness, and rice vinegar adds a restrained tang. It will not taste exactly like a sauce made with mirin, but it gives a glossy, balanced glaze that works well on rice bowls, cooked fish, and vegetables.
Why is my sauce thin?
It may need more time to reduce, or it may not have cooled enough. The sauce is noticeably thinner while hot and firms up as it stands. Let it cool for 5 minutes before deciding; if it still runs off a spoon, simmer it gently for another minute and check again. Do not judge the final texture from the first hot pour.
Why did my eel sauce turn too thick or too salty?
It was probably reduced too far. Sugar and soy become more concentrated as water evaporates, and the sauce thickens further in the refrigerator. Stir in water a teaspoon at a time until the texture and flavor are balanced. Next time, stop reducing when it lightly coats a spoon rather than waiting for it to look fully syrupy in the pan.
Can I use this as a marinade?
You can use a small amount to season food before cooking, but it is better as a finishing glaze because its sugar can burn during prolonged cooking. Set aside a clean portion before it touches raw fish or other raw ingredients. Never use marinade that has contacted raw seafood as a ready-to-eat dipping sauce unless it has been brought to a full boil.
Is eel sauce the same as teriyaki sauce?
They share a sweet soy flavor, but they are not always interchangeable. Eel sauce is often reduced to a thicker, more concentrated glaze and is traditionally associated with grilled eel and rice. Teriyaki sauce can include other aromatics and may be used as a marinade as well as a finishing sauce. Both have many home and regional variations.
Related
- Beef and Chickpea Curry with a Rich, Spiced Sauce
- BBQ Rabbit Recipe for Tender, Smoky Grilled Rabbit
- BBQ Squid Recipe: Smoky, Tender Grilled Calamari at Home
More recipes to cook
Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
Spotted an error? Tell us and we will correct it (corrections policy).