Mackerel Fillets with Dill-Caper Crust
Fatty mackerel fillets baked with a herbaceous dill-caper crust, delivering rich omega-3s in a 12-minute weeknight dinner. This nordic-inspired seafood (keto, high protein) ready in about 27 minutes pairs (6 oz each, 170g each) mackerel fillets, olive oil, (120g), full-fat sour cream for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 360 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. 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 each, 170g each) mackerel fillets
- 2 tbsp olive oil
- 1/2 cup (120g), full-fat sour cream
- 2 tbsp, drained and chopped capers
- 1 tbsp, chopped fresh dill
- 1/2 tsp lemon zest
- 1/4 tsp salt
- 1/4 tsp black pepper
Instructions
- Step 1: Preheat oven to 400°F (200°C). Place mackerel fillets on a baking sheet, brush with 2 tbsp olive oil, and season with 1/4 tsp salt and 1/4 tsp black pepper.
- Step 2: In a small bowl, mix 1/2 cup sour cream, 2 tbsp chopped capers, 1 tbsp chopped fresh dill, and 1/2 tsp lemon zest until smooth.
- Step 3: Spread the sour cream mixture evenly over the mackerel fillets.
- Step 4: Bake for 12-15 minutes until the mackerel is cooked through and the topping is lightly golden.
- Step 5: Serve immediately with extra dill for garnish.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Mackerel Fillets with Dill-Caper Crust take to make?
Total time is about 27 minutes (15 min prep + 12 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Mackerel Fillets with Dill-Caper Crust?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep olive oil from drying out.
Can I substitute ingredients in Mackerel Fillets with Dill-Caper Crust?
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 Mackerel Fillets with Dill-Caper Crust 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.
Is Mackerel Fillets with Dill-Caper Crust keto?
Yes — this recipe is tagged keto, high protein based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★☆
Almost perfect — just needed a squeeze of lemon at the end.
- ★★★☆☆
It was fine. Came out a bit bland for my taste.
