Grilled Eel Recipe: Sweet Soy Glaze and Grill Tips

This Japanese-inspired grilled eel is brushed with a glossy soy, mirin, and sake glaze, then cooked over the grill until tender and lightly charred. It takes cues from kabayaki, a familiar Japanese style of glazed eel; regional methods differ, with some cooks steaming eel before grilling and others grilling it directly.

Ingredients

1½ lb (680 g) cleaned, boneless eel fillets, skin on, fresh or fully thawed
⅓ cup (80 ml) Japanese soy sauce
¼ cup (60 ml) mirin
2 tbsp (30 ml) sake
3 tbsp (38 g) granulated sugar
1 tsp (5 ml) neutral oil, such as canola or avocado oil, for the grill basket or grate
2 tbsp (12 g) thinly sliced scallions, for serving
1 tbsp (9 g) toasted sesame seeds, for serving

Instructions

Prepare the grill and fish. Set up a gas or charcoal grill for medium heat, about 375–400°F (190–205°C), with a cooler area available for indirect heat. Preheat for 10–15 minutes. If the eel is in long pieces, cut it into sections that fit your grill basket. Pat the fillets dry with paper towels and check for pin bones, removing any you find with clean tweezers. Keep the skin on: it helps the fillets hold together and protects the flesh from the heat.
Make the glaze. In a small saucepan, stir together the soy sauce, mirin, sake, and sugar. Bring to a gentle simmer over medium heat, stirring until the sugar dissolves. Simmer for 6–8 minutes, until the sauce looks glossy and lightly thickened; it should still run off a spoon rather than turn syrupy. Take the pan off the heat and let the glaze cool for 5 minutes. Pour about 2 tablespoons (30 ml) into a clean small bowl to reserve for serving. Do not let a brush that touches raw fish go back into this reserved sauce.
Oil the cooking surface. Lightly brush a grill basket with the neutral oil. If you do not have a basket, oil a clean grill grate carefully using an oil-dipped paper towel held with long tongs. Eel is delicate and can stick, so a basket or a flat perforated grill tray makes turning easier. Avoid pouring oil directly onto the grill, where it can flare.
Grill the eel skin-side down. Lay the fillets in the basket or on the grate, skin-side down. Close the lid and cook over medium heat for about 5–7 minutes, checking that the skin is not scorching. Move the fish to the cooler side if flames flare or the edges darken too quickly. When the flesh begins to turn opaque and the fillets release fairly easily, carefully turn them with a wide spatula or tongs.
Glaze and finish cooking. Cook the second side for 3–5 minutes, then brush the upper surface with a thin layer of glaze. Turn once more and glaze the other side. Continue grilling for another 1–2 minutes, just long enough for the glaze to set and pick up a little char; sugary sauce burns quickly, so keep the fish away from intense flames. Check the thickest part with a food thermometer. USDA FSIS lists 145°F (63°C) as the safe minimum internal temperature for fish; remove the eel when it reaches that temperature.
Serve. Transfer the eel to a clean platter and let it rest for 2 minutes so the glaze settles. Brush lightly with some of the reserved sauce, then scatter over the scallions and sesame seeds. Serve while hot, with any remaining reserved sauce at the table.

Tips

Buy eel that is ready to cook. Ask a fishmonger for cleaned, boneless eel fillets, or look for frozen cleaned fillets and thaw them in the refrigerator before grilling. Preparing a whole eel is a specialist task and is not needed for this recipe. If a fillet has pin bones, remove them before it goes on the grill.
Keep the heat moderate. Eel has a rich, fatty texture, while the glaze contains sugar. Very high heat can char the outside before the thick parts cook through. Use the cooler zone when needed, and apply the glaze only near the end rather than coating the raw fish heavily.
Adjust the glaze if needed. Japanese mirin gives the sauce gentle sweetness and a mild, rounded flavor. If it is unavailable, use 3 tablespoons (45 ml) water plus 1 tablespoon (15 ml) rice vinegar in place of the ¼ cup (60 ml) mirin; the result will be less sweet and a little sharper. If you do not cook with sake, replace it with the same amount of water.
Keep raw-fish tools separate. Use one brush for glazing the eel during grilling and a clean spoon or brush for the reserved sauce. Never serve sauce that has touched raw fish unless it has been brought back to a boil. This small precaution keeps the table sauce clean and ready to use.

Serving Suggestions

For a classic Japanese-inspired plate, serve the grilled eel over hot short-grain rice, with a little reserved glaze spooned over the rice. Add a crisp, simple side such as sliced cucumber dressed with rice vinegar, steamed greens, or a light cabbage salad to balance the eel’s rich texture. Miso soup and pickled vegetables also make natural accompaniments, though the fish is flavorful enough to serve with just rice and one vegetable.

If serving the fillets as part of a shared meal, cut them crosswise into bite-size pieces after grilling and arrange them on a platter. Keep the sauce on the side so each person can choose how much to add. A squeeze of lemon is not traditional to every style, but a small wedge can be offered for diners who like a brighter finish. For a meal with more substantial sides, plain rice, grilled eggplant, or blanched green beans all work without competing with the glaze.

Variations

Try a steamed-then-grilled texture. Some Japanese preparations steam eel before glazing and grilling, which makes the flesh especially tender and renders some of its fat. For a home version, steam the cleaned fillets until just opaque, then pat them dry and finish them over the grill with the glaze for a few minutes. The extra step changes the texture and adds handling time; check the center with a thermometer and still cook fish to 145°F (63°C).

Make it less sweet. Reduce the sugar to 2 tablespoons (25 g) for a more savory glaze. It will be thinner and less lacquer-like, so brush on a little at a time and expect less browning. For a touch of heat, add ¼ teaspoon (1 g) ground chili to the sauce as it simmers. That makes the flavor warmer without turning the eel into a heavily spiced dish.

Use a grill pan. When outdoor grilling is not practical, cook the eel in a lightly oiled ridged grill pan over medium heat. Keep the kitchen ventilated, because fish and sweet sauce can produce smoke. Follow the same timing as a starting point, turn gently, and rely on the thermometer rather than the clock alone. A broiler can also work, but place the fish several inches from the element and watch it closely once glazed.

Start with prepared kabayaki eel. Some shops sell eel that has already been grilled and glazed, often frozen. That product is not a substitute for the raw fillets in the main method: follow its package directions and heat leftovers or prepared seafood to 165°F (74°C). It is a convenient option when fresh eel is hard to find, but it will usually be sweeter and more thoroughly cooked than eel grilled from raw.

Storage and Reheating

Refrigerate leftover eel within 2 hours of cooking, in a shallow airtight container. Store it with any unused clean sauce kept separately. Cooked fish is best within 3–4 days in the refrigerator, although the surface will gradually lose its freshly grilled texture. Do not leave the eel at room temperature for longer than 2 hours, or longer than 1 hour if the temperature is above 90°F (32°C).

For the best texture, reheat only the portion you plan to eat. Place the eel in a covered skillet with a teaspoon of water, or a little clean sauce, over low heat until hot throughout. You can also warm it in a covered oven-safe dish at 300°F (150°C); check the center with a food thermometer and heat leftovers to 165°F (74°C). A microwave works for a quick portion, but use short bursts at medium power and cover the dish to reduce drying. Avoid repeated reheating and cooling.

To freeze, wrap cooled portions airtight and freeze for up to 2 months for best quality. Thaw them overnight in the refrigerator and reheat to 165°F (74°C). Freezing is a quality choice rather than a reason to keep cooked fish indefinitely, so label the container with the date and discard it if it has been stored too long or handled unsafely.

Frequently Asked Questions

What does grilled eel taste like?
Eel has a rich, tender texture and a mild savory flavor that works well with the sweet-salty soy glaze. It is not strongly fishy when fresh and handled properly. The sauce contributes most of the familiar kabayaki character, while the grill adds a little smokiness and char.

Can I grill eel with the skin on?
Yes. Cleaned eel fillets are commonly grilled skin-side down, and the skin helps the delicate flesh stay in one piece. It also helps shield the fillet from direct heat. If you prefer not to eat the skin, it is easy to separate from the flesh after cooking.

Where can I buy eel for this recipe?
Check a seafood counter that handles eel or a Japanese or other East Asian grocery with a frozen seafood section. Ask for cleaned, boneless fillets intended for cooking, not a whole live eel. Frozen fillets should be thawed in the refrigerator before grilling; do not thaw seafood on the counter.

Can I make the glaze ahead?
Yes. Make and cool the sauce, then refrigerate it in a covered container for up to 4 days. Warm it gently before brushing if it has thickened in the refrigerator. Keep the sauce intended for serving separate from anything used on raw fish, and discard any glaze that has been contaminated by raw-fish utensils.

How do I know when eel is done?
Use an instant-read food thermometer in the thickest section, taking care not to press the probe against the grill basket. Fish should reach 145°F (63°C), the USDA FSIS safe minimum internal temperature. The flesh should also look opaque and separate easily, but those visual signs are not as reliable as checking the temperature.

Can I make this without mirin?
Yes. Replace the mirin with 3 tablespoons (45 ml) water and 1 tablespoon (15 ml) rice vinegar, as suggested in the tips. The sauce will taste less sweet and slightly more tart. If you have no sake, use water for that amount; the glaze will still coat the eel, though its flavor will be a little simpler.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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