Baked Cod with Lemon-Dill Butter and Roasted Fingerling Potatoes

By AislePrompt Editorial · Published 2026-06-13 · Updated 2026-06-13

Tender baked cod fillets topped with a bright lemon-dill butter served alongside crispy roasted fingerling potatoes. This Mediterranean-inspired seafood recipe, ready in about 55 minutes, pairs cod fillets, fingerling potatoes, unsalted butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 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.

Ingredients

• 4 pieces, 6 oz each cod fillets
• 1 lb, halved lengthwise fingerling potatoes
• 4 tbsp, melted unsalted butter
• 2 tbsp, finely chopped fresh dill
• 1 tsp lemon zest
• 2 tbsp lemon juice
• 3, minced garlic cloves
• 2 tbsp olive oil
• 1 tsp sea salt
• 1/2 tsp black pepper

The sheet pan we’d roast this on → Best Sheet Pans in 2026: Top Picks + Buying Guide

Instructions

1. Step 1: Preheat oven to 425°F. Toss 1 lb halved fingerling potatoes with 2 tbsp olive oil, 1/2 tsp sea salt, and 1/4 tsp black pepper on a baking sheet. Roast for 25 minutes until tender and slightly crisp at the edges.
2. Step 2: Meanwhile, in a small bowl, combine 4 tbsp melted unsalted butter, 2 tbsp lemon juice, 1 tsp lemon zest, 2 tbsp finely chopped fresh dill, and 3 minced garlic cloves. Stir until well mixed and fragrant.
3. Step 3: After 25 minutes, push potatoes to the side and place 4 cod fillets on the baking sheet. Brush each fillet generously with the lemon-dill butter mixture, reserving some for serving. Sprinkle 1/2 tsp sea salt and 1/4 tsp black pepper over the fish.
4. Step 4: Bake everything together for 12-15 minutes until the cod is opaque and flakes easily with a fork. Remove from oven and spoon remaining lemon-dill butter over the cod before serving.