Miso Infused Black Cod Recipe

Make and cool marinade

In a medium bowl, whisk together the white miso, mirin, sake, granulated sugar, soy sauce, grated ginger, and minced garlic until smooth and homogenous. Taste and adjust: it should be sweet-savory with pronounced miso flavor. Let the marinade sit for 5 minutes so the sugar dissolves and flavors meld. If the mixture is very thick, thin with 1–2 teaspoons of warm water or additional mirin to reach a spreadable paste.

Reserve 2 tablespoons of the finished marinade in a small airtight container for finishing during the final sear/roast step (this will be brushed on later).

Prepare fillets

Pat the black cod fillets dry with paper towels. Lightly score the skin side in a 1/2-inch diamond pattern (do not cut through) to help render fat and prevent curling. Season the flesh side lightly with kosher salt (about 1/4 teaspoon per fillet) and let sit at room temperature for 10 minutes while you finish the marinade.

Marinate

Place each fillet skin-side down in a shallow container or zip-top bag. Spread an even layer (about 2 tablespoons) of the miso marinade over the flesh of each fillet, covering edge-to-edge. For a deeper flavor, refrigerate and marinate for 12–48 hours (12 hours is sufficient; up to 48 hours intensifies the flavor). If marinating longer than 2 hours, place fillets on a rack over a tray to catch drips and cover loosely with plastic wrap. Before cooking, remove fillets from the refrigerator and let them sit at room temperature for 20–30 minutes.

Preheat oven or broiler

Preheat the oven to 400°F (205°C) if roasting, or prepare the broiler on high if broiling. If using a broiler, position the oven rack 6–8 inches from the heat source. Line a baking sheet with foil and lightly oil or place a wire rack on the sheet to allow airflow under the fillets.

Roast or broil the fillets

For oven roasting: brush the skin lightly with 1 teaspoon of oil and place fillets skin-side down on the prepared tray. Roast at 400°F for 8–12 minutes, depending on thickness, until the flesh is opaque and flakes easily with a fork and the internal temperature reaches 125–130°F for moist, buttery texture. In the last 1–2 minutes of cook time, brush the reserved 2 tablespoons of marinade onto the flesh and switch to the broil setting for a quick glaze (watch closely to avoid burning). For broiling only: place fillets skin-side down and broil 6–10 minutes, brushing the reserved marinade on in the final 1–2 minutes until caramelized. Total cook time will vary with thickness; do not overcook.

Pan-sear alternative (for crispier skin)

If you prefer a crisp skin, heat a large ovenproof skillet over medium-high heat with 1 tablespoon neutral oil until shimmering. Place fillets skin-side down and press gently with a spatula for 10–15 seconds to keep contact. Sear skin-side down 3–4 minutes until well-browned and fat renders. Flip, brush flesh with reserved marinade, then transfer skillet to the 400°F oven for 5–7 minutes until cooked through.

Remove fish from oven or skillet and let rest 2 minutes before serving. The miso glaze will firm slightly as it cools.

Transfer fillets to individual plates, skin-side down. Sprinkle with sliced scallions and toasted sesame seeds, and add a small mound of pickled ginger or microgreens if using. Serve with lemon wedges on the side for those who prefer a bright finish.

Serve immediately. Leftover miso black cod can be refrigerated up to 2 days; gently reheat in a low oven (300°F/150°C) just until warmed to preserve texture.