Easy Black Cod with Miso and Wasabi Mashed Potatoes Recipe

Black cod crafts ordinary seafood dinners into extraordinary culinary experiences with its buttery texture and remarkable flavor profile.

This delicate fish brings an elegant touch to home cooking, promising restaurant-quality results in your own kitchen.

Japanese-inspired marinades elevate the mild, silky flesh of black cod, creating depth and complexity rarely found in seafood preparations.

miso umami-rich character provides a perfect complementary backdrop for the fish’s natural sweetness, while wasabi mashed potatoes offer a subtle, zesty counterpoint.

Sophisticated yet approachable, this recipe breaks through traditional seafood preparation boundaries with bold, harmonious ingredients.

Professional chefs and home cooks alike can achieve impressive results by understanding the nuanced techniques required for perfect preparation.

Prepare to impress dinner guests with a meal that balances tradition and innovation.

Why You’ll Be Drawn to Black Cod with Miso and Easy Wasabi Mashed Potatoes

• Elevate Seafood Flavor: The miso marinade transforms black cod into a rich, umami-packed delicacy that infuses deep Japanese-inspired flavors, creating a restaurant-quality dish at home.
• Quick Gourmet Technique: Using a simple two-step cooking method of grilling and baking ensures perfectly cooked fish with a caramelized exterior and tender, flaky interior in just 14 minutes.
• Spice Up Comfort Food: The wasabi mashed potatoes offer a creative twist on classic side dishes, delivering a subtle heat and creamy texture that complements the delicate fish perfectly.
• Minimal Effort, Maximum Impact: This recipe requires simple ingredients and straightforward techniques, making it accessible for home cooks while delivering impressive, sophisticated results that will surprise dinner guests.

Ingredients for Black Cod with Miso and Easy Wasabi Mashed Potatoes

Main Ingredients:

Black Cod and Seafood: – Black Cod: Delicate white fish with rich, buttery texture perfect for miso marinade. Choose fresh, sustainably sourced fish with firm, translucent flesh.

Potatoes: – Russet Potatoes: Starchy potato ideal for creating creamy, smooth mashed texture. Select firm potatoes without sprouts or green patches.

Marinade and Seasoning Ingredients:

Miso and Seasonings: – White Miso Paste: Traditional Japanese fermented soybean paste providing deep umami flavor. Choose light, sweet variety for delicate fish.

• Mirin, Sake: Japanese rice wines that add subtle sweetness and depth to marinade. Select authentic, high-quality cooking versions.
• Sugar: Balances and caramelizes marinade, creating rich glaze for fish.
• Salt, Black Pepper: Essential seasoning to enhance potato and fish flavors.
• Wasabi Paste: Provides sharp, spicy kick to mashed potatoes. Choose authentic Japanese wasabi for best flavor.

Dairy and Liquid Ingredients:

Dairy and Broth Components: – Butter, Milk: Create smooth, rich texture for mashed potatoes. Use whole milk for maximum creaminess.

• Chicken Broth: Adds moisture and subtle flavor when cooking potatoes. Low-sodium version recommended.
• Maccha Salt: Finishing garnish with green tea salt for extra complexity. Adds visual and flavor interest.

Instructions for Black Cod with Miso and Wasabi Mashed Potatoes

Step 1: Prepare Miso Marinade

In a small saucepan, combine mirin and sake, bringing them to a boil. Whisk in miso until completely dissolved. Add sugar and cook until fully incorporated. Allow the marinade to cool completely.

Step 2: Marinate Black Cod

Pour the cooled miso marinade over the black cod. Cover and refrigerate overnight to allow flavors to penetrate deeply.

Step 3: Preheat and Prepare Cooking Surface

Set the oven to 400°F. Prepare a grill or broiling surface for initial searing.

Step 4: Cook Black Cod

Grill the marinated black cod for 2 minutes on each side. Transfer to the preheated oven and bake for 10 minutes until fish is perfectly cooked and flakes easily.

Step 5: Create Wasabi Mashed Potatoes

• Cubed potatoes
• Broth
• Milk
• Butter
• Wasabi paste
• Salt
• Pepper

Step 6: Cook Potato Base

Microwave cubed potatoes with broth until tender and easily mashed.

Step 7: Prepare Creamy Potato Mixture

• Wasabi paste
• Salt
• Pepper

Step 8: Combine and Mash

Blend the warm milk mixture with cooked potatoes. Mash until smooth and creamy.

Step 9: Garnish

Sprinkle maccha salt over the mashed potatoes and serve alongside the miso black cod.

Serving Suggestion: Plate the black cod with a generous scoop of wasabi mashed potatoes for a delightful fusion of flavors.

Tips for Cooking Black Cod with Miso

• Marinate Strategically: Let the black cod sit in miso mixture overnight to ensure deep, rich flavor penetration into the delicate fish.
• Check Fish Doneness: Use a fork to gently test fish flakiness – it should easily separate and appear opaque white when perfectly cooked.
• Temperature Matters: Keep oven precisely at 400°F to achieve that perfect caramelized exterior while maintaining moist fish interior.
• Wasabi Balance: Start with small amounts of wasabi and taste gradually to prevent overwhelming heat in mashed potatoes.
• Smooth Potato Technique: Use a potato ricer or masher for ultra-creamy texture, avoiding over-mixing which can make potatoes gluey.

Storing and Reheating Miso Black Cod with Wasabi Potatoes

• Refrigeration: Store leftover black cod and mashed potatoes in separate airtight containers within 2 hours of cooking. Seal tightly to prevent moisture loss and bacterial growth, keeping them fresh for up to 3 days in the refrigerator.
• Reheating Fish: Gently warm black cod in a preheated 275°F oven for 8-10 minutes, covering with foil to retain moisture. Avoid microwaving to prevent the delicate fish from becoming tough and rubbery.
• Potato Refreshing: Revive wasabi mashed potatoes by adding a splash of warm milk or broth while stirring over low heat. Break up any clumps and mix until creamy, restoring their original smooth texture and warmth.

Black Cod with Miso Pairing Suggestions

• Pair with Crisp Sake: Select a premium junmai daiginjo sake that complements the delicate black cod's miso glaze, enhancing the umami flavors while providing a clean, smooth finish.
• Serve with Pickled Vegetable Salad: Create a light cucumber and daikon radish quick pickle with rice vinegar to cut through the richness of the fish and provide a refreshing contrast.
• Match with Chilled Green Tea: Brew a high-quality sencha or gyokuro green tea to highlight the Japanese-inspired elements of the dish, its subtle grassiness balancing the wasabi's heat and the cod's sweetness.
• Complement with Edamame Garnish: Sprinkle sea salt-dusted steamed edamame around the plate to add texture, protein, and a subtle nutty flavor that echoes the maccha salt's complexity.

Recipe Variations for Black Cod with Miso

• Salmon Switch: Replace black cod with wild-caught salmon, maintaining the same miso marinade and cooking technique for a rich, omega-3 packed seafood experience.
• Vegetarian Remix: Transform the dish by using firm tofu instead of fish, pressing and marinating it in the miso glaze before baking for a plant-based alternative.
• Spicy Korean Fusion: Swap wasabi for gochujang in the mashed potatoes, adding a deep, complex heat and creating a Korean-inspired side dish that complements the miso-glazed fish.
• Coconut Tropical Adaptation: Incorporate coconut milk into the mashed potatoes and add a touch of lime zest for a tropical flavor profile that brightens the umami-rich miso glaze.

Black Cod With Miso And Easy Wasabi Mashed Potatoes Recipe

---

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

4.9 from 29 reviews

• Total Time: 45 minutes
• Yield: 4 1x

Print Recipe

Pin Recipe

Description

Succulent Black Cod with Miso showcases Japanese culinary artistry, harmonizing delicate fish with rich umami miso glaze. Creamy wasabi mashed potatoes provide a perfect complementary warmth that elevates you straight to Pacific coastal comfort.

---

Ingredients

Scale 1x2x3x

Main Ingredients:

• 6 to 7 ounces (170 to 198 grams) skinless black cod fillets, about 1 ½ inches thick
• 10–12 small Yukon gold potatoes, scrubbed well, peeling optional

Marinade and Seasoning:

• ½ cup (120 milliliters) white miso paste
• ⅓ cup (66 grams) sugar
• 3 tablespoons (45 milliliters) mirin
• 3 tablespoons (45 milliliters) sake
• ½ teaspoon salt
• ¼ teaspoon freshly ground pepper
• 4 teaspoons powdered wasabi

Additional Ingredients:

• ½ cup (120 milliliters) chicken or vegetable broth
• 1 cup (240 milliliters) low-fat or non-fat milk
• 3 cloves garlic, crushed
• 1 tablespoon butter (optional)
• Vegetable oil, for grilling
• Pickled ginger, for serving
• Maccha salt to garnish (optional)

Cook Mode Prevent your screen from going dark

---

Instructions

1. Prepare the miso marinade by combining mirin and sake in a small saucepan, bringing the liquid to a vigorous boil over medium-high heat.
2. Whisk premium white miso paste into the boiling liquid until completely incorporated and smooth.
3. Add granulated sugar to the miso mixture, stirring continuously until the sugar dissolves entirely.
4. Remove the marinade from heat and allow it to cool to room temperature, approximately 15-20 minutes.
5. Submerge black cod fillets completely in the cooled miso marinade, ensuring full coverage, and refrigerate overnight for maximum flavor penetration.
6. Preheat the oven to 400°F (204°C) and prepare a grill or broiler pan with non-stick cooking spray.
7. Remove cod from marinade, gently patting excess liquid with paper towels, and place on the prepared grill or broiler pan.
8. Sear the fish for precisely 2 minutes on each side to develop a golden-brown exterior and create beautiful grill marks.
9. Transfer the seared cod to the preheated oven and bake for 10 minutes, ensuring the fish is cooked through but remains tender and moist.
10. For wasabi mashed potatoes, cube russet potatoes into uniform 1-inch pieces to ensure even cooking.
11. Microwave potato cubes with low-sodium chicken broth for 8-10 minutes until fork-tender and easily mashed.
12. In a separate saucepan, gently warm whole milk and unsalted butter until the butter melts completely.
13. Incorporate premium wasabi paste, kosher salt, and freshly ground black pepper into the warm milk-butter mixture.
14. Combine the seasoned milk mixture with the cooked potatoes and mash until smooth and creamy.
15. Garnish the wasabi mashed potatoes with a delicate sprinkle of maccha salt for an elegant finishing touch.

Notes

• Marinate the black cod in miso mixture overnight for deep, rich flavor absorption that transforms the delicate fish.
• Prepare the miso marinade ahead of time to allow complex umami notes to develop fully before cooking.
• Use fresh, high-quality black cod for the most tender and buttery texture that melts in your mouth.
• Microwave potatoes with broth creates a quick, efficient cooking method that preserves nutrients and speeds up preparation.
• Wasabi adds a subtle, unexpected heat that elevates traditional mashed potatoes from ordinary to extraordinary.
• Garnish with maccha salt to introduce a sophisticated, traditional Japanese finishing touch that enhances overall dish complexity.

• Prep Time: 30 minutes
• Cook Time: 15 minutes
• Category: Dinner
• Method: Baking
• Cuisine: Japanese

Nutrition

• Serving Size: 4
• Calories: 412
• Sugar: 27
• Sodium: 680
• Fat: 15
• Saturated Fat: 5
• Unsaturated Fat: 8
• Carbohydrates: 43
• Fiber: 3
• Protein: 28
• Cholesterol: 75