Shio Koji-Marinated Cod with Pickled Plum Sauce
Japanese cod fillets marinated in shio koji (rice brine) and grilled to perfect tenderness, served with a tangy ume plum sauce for bright contrast. This japanese-inspired seafood ready in about 127 minutes blends (6 oz/170g each), skin-on cod fillets, shio koji, rice vinegar into a versatile sauce that lifts everything from grain bowls and roasted vegetables to grilled proteins — a small-batch staple worth keeping in the fridge. Each serving lands at about 290 calories and feeds 2, so a small batch covers several meals across the week without taking over the fridge. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 2 (6 oz/170g each), skin-on cod fillets
- 3 tbsp shio koji
- 1 tbsp rice vinegar
- 1 tsp sugar
- 2, pitted and mashed dried plum (umeboshi)
- 2 tbsp mirin
- 1 tbsp soy sauce
- 2 tbsp water
Instructions
- Step 1: In a small bowl, mix shio koji, rice vinegar, and sugar until dissolved; coat cod fillets evenly on both sides and refrigerate for 2 hours.
- Step 2: Whisk together mashed dried plum, mirin, soy sauce, and water in a saucepan; bring to a simmer over medium heat for 5 minutes until thickened slightly.
- Step 3: Heat a non-stick skillet over medium-high; remove cod from marinade and place skin-side down. Cook for 4 minutes until skin is crispy and golden.
- Step 4: Flip cod and cook for another 3 minutes until fish flakes easily with a fork.
- Step 5: Drizzle with 2 tbsp pickled plum sauce and serve immediately with remaining sauce on the side.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Shio Koji-Marinated Cod with Pickled Plum Sauce take to make?
Total time is about 127 minutes (120 min prep + 7 min cook). A small batch typically covers several meals in the week — store as the recipe directs.
How do I store leftover Shio Koji-Marinated Cod with Pickled Plum Sauce?
Transfer to an airtight jar and refrigerate for up to 5–7 days. Most sauces freeze well for up to 2 months — portion into small containers or freezer bags so you can thaw only what you need. Stir before serving; cream- or yogurt-based sauces may separate on standing.
Can I substitute ingredients in Shio Koji-Marinated Cod with Pickled Plum Sauce?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Shio Koji-Marinated Cod with Pickled Plum Sauce for a different number of people?
The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with Shio Koji-Marinated Cod with Pickled Plum Sauce?
Japanese seafood like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
What others are saying
- ★★★★☆
Enjoyable meal. Instructions could be a touch more detailed on the timing.
- ★★★★☆
Tasty recipe. I'd add a bit more seasoning next time.
- ★★★★☆
My family liked it. I personally would prefer more depth of flavor.
