Parmesan Crusted Cod with Lemon Garlic Butter in One Skillet Step-by-step instructions

Before you start

Measure every ingredient into small prep bowls, pat proteins or vegetables dry with paper towels, and preheat your pan thoroughly before adding oil so browning starts cleanly without steaming.

Take your time with each step, and the result will be worth every minute spent in the kitchen.

Instructions

Prep and Aromatics

1. 1Grate and season the crust
   Grate the Parmesan on a box grater until you have a fine, fluffy pile. In a shallow dish, combine the grated Parmesan, panko, minced garlic, chopped parsley, salt and black pepper. Mix with a fork until evenly combined.
   Look for The crumbs look evenly speckled with green parsley and pale cheese.
   Tip Grate the Parmesan just before using so it stays light and sticks well to the fish.
2. 2Coat the cod in the crust
   Pat the cod fillets dry with paper towels and season them lightly with salt and pepper. Press each fillet firmly into the Parmesan and panko mixture on both sides so the crust adheres. Set the coated fillets on a plate while you prepare the pan.
   Look for Each fillet has an even, thick coating with no bare spots of fish.
   Tip Keep the fish refrigerated until you cook it, and do not leave it out more than 30 minutes.

Every ingredient is evenly coated, fragrant and progressing at a steady gentle sizzle without sticking to the pan surface.

Take a moment to check the color, texture and aroma before moving on to the next stage.

Main Cooking Stage

3. 3Melt the garlic butter
   Set the cast iron skillet over medium heat and melt the butter. Add the lemon slices and the minced garlic and let them sizzle gently for about 1 minute. Then add the spinach leaves and let them wilt into the butter.
   Look for The butter is foaming and the lemon slices sizzle with a bright garlic aroma.
   Tip Keep the heat at medium so the garlic turns golden without scorching.
4. 4Sear the crusted cod
   Place the crusted cod fillets on top of the spinach and lemon in the skillet. Spoon the bubbling lemon garlic butter over the fish. Cook for about 5 minutes, spooning the butter over the fillets now and then, until the crust is golden brown.
   Look for The crust is golden brown on the bottom and the butter bubbles around the fish.
   Tip Spoon the butter over the top of the fillets to help the crust brown evenly.

Every ingredient is evenly coated, fragrant and progressing at a steady gentle sizzle without sticking to the pan surface.

Take a moment to check the color, texture and aroma before moving on to the next stage.

Final Glaze and Plating

5. 5Flip, finish and serve
   Flip the fillets carefully with tongs and cook 4 to 6 minutes more, until the flesh is opaque, flakes easily with a fork and reaches 145°F (63°C) in the thickest part. Sprinkle with extra Parmesan, then serve with the spinach, lemon wedges and a drizzle of the pan butter.
   Look for The flesh is opaque and flakes easily, and the crust is golden on both sides.
   Safe temperature 145°F (63°C) internal temperature (fish)
   Tip Check the thickest part with a thermometer; the fish is done at 145°F (63°C).

Every ingredient is evenly coated, fragrant and progressing at a steady gentle sizzle without sticking to the pan surface.

Take a moment to check the color, texture and aroma before moving on to the next stage.

Common mistakes

Avoid crowding the pan or flipping too early before a crust forms, keep the burner at steady medium-high heat so aromatics never scorch, and season in balanced layers rather than only at the end.

How to tell it’s done

The dish is ready when the exterior shows even golden color, the center feels tender when pressed gently with a fork, and the sauce coats the back of a spoon glossy and fragrant.

• Fish: 145°F (63°C) in the thickest part