Baked Haddock with Lemon and Thyme

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Flaky haddock fillets baked with bright lemon slices and fragrant thyme, creating a simple yet elegant dish perfect for weeknight dinners. This irish-inspired seafood ready in about 25 minutes pairs (6 oz each, 180g total) haddock fillets, medium, thinly sliced lemon, chopped fresh thyme for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 260 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: 10 min Cook: 15 min Serves 4 Irish cuisine 260 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 400°F (200°C). Place 4 haddock fillets in a baking dish.
  2. Step 2: Arrange 1 thinly sliced lemon over the fillets, then sprinkle with 2 tbsp chopped fresh thyme, 2 tbsp olive oil, 1/2 tsp salt, and 1/4 tsp black pepper.
  3. Step 3: Bake for 12-15 minutes until fish is opaque and flakes easily with a fork.

Frequently asked questions

How long does Baked Haddock with Lemon and Thyme take to make?

Total time is about 25 minutes (10 min prep + 15 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 Baked Haddock with Lemon and Thyme?

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 medium, thinly sliced lemon from drying out.

Can I substitute ingredients in Baked Haddock with Lemon and Thyme?

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 Baked Haddock with Lemon and Thyme 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.

What goes well with Baked Haddock with Lemon and Thyme?

Irish 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.

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