Pan-Seared Trout with Lemon Caper Butter and Roasted Fingerlings

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A delicate pan-seared trout fillet topped with a bright lemon caper butter sauce, served alongside crispy roasted fingerling potatoes. This american-inspired seafood (gluten free) ready in about 50 minutes pairs fillets (6 oz each) trout fillets, fingerling potatoes, unsalted butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 calories and feeds 4, 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.

Prep: 15 min Cook: 35 min Serves 4 American cuisine 420 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 425°F. Wash and halve 1 lb fingerling potatoes, toss with 2 tbsp olive oil, 1/2 tsp salt, and 1/2 tsp black pepper. Spread on a baking sheet and roast for 25-30 minutes until golden and tender.
  2. Step 2: While potatoes roast, zest and juice 1 medium lemon, then melt 4 tbsp unsalted butter in a small saucepan over low heat. Stir in 2 tbsp drained capers, lemon zest, and 1 tbsp lemon juice, warming gently for 2 minutes.
  3. Step 3: Heat 1 tbsp olive oil in a large skillet over medium-high heat. Pat dry 4 trout fillets and season both sides with 1/2 tsp salt and 1/2 tsp black pepper. Place skin-side down and cook for 4 minutes until skin is crisp, then flip and cook for 2 minutes until fish flakes easily.
  4. Step 4: Remove trout from heat and spoon 2 tbsp lemon caper butter over each fillet. Transfer roasted potatoes to plates, top with trout, drizzle remaining butter sauce, and garnish with 2 tbsp chopped fresh parsley.

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Frequently asked questions

How long does Pan-Seared Trout with Lemon Caper Butter and Roasted Fingerlings take to make?

Total time is about 50 minutes (15 min prep + 35 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 Pan-Seared Trout with Lemon Caper Butter and Roasted Fingerlings?

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 fingerling potatoes from drying out.

Can I substitute ingredients in Pan-Seared Trout with Lemon Caper Butter and Roasted Fingerlings?

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 Pan-Seared Trout with Lemon Caper Butter and Roasted Fingerlings for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). 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 Pan-Seared Trout with Lemon Caper Butter and Roasted Fingerlings gluten free?

Yes — this recipe is tagged gluten free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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