James Martin Blackened Cod is a bold, flavour-packed fish dish with a beautifully spiced crust and tender, flaky centre. The cod is coated in a smoky Cajun-style seasoning, then seared at high heat until perfectly blackened on the outside while staying moist within. It is surprisingly simple to prepare, making it ideal for both weeknight dinners and relaxed weekend cooking. From start to finish, this recipe takes around 25 minutes and is suitable for confident beginners.
Ingredients
For the Blackened Spice Mix
- 1 tbsp smoked paprika
- 1 tsp sweet paprika
- 1 tsp garlic powder
- 1 tsp onion powder
- 1 tsp dried thyme
- 1 tsp dried oregano
- ½ tsp cayenne pepper
- ½ tsp freshly ground black pepper
- 1 tsp sea salt
For the Cod
- 4 cod fillets (about 150–180g each), skinless and boneless
- 2 tbsp olive oil
- 1 tbsp unsalted butter
- 1 lemon, cut into wedges
- Fresh parsley, finely chopped, for garnish
How to Make James Martin Blackened Cod
- Prepare the oven: Preheat the oven to 200°C or 180°C fan. Place a shelf in the middle of the oven so the fish finishes cooking evenly after searing.
- Mix the spice blend: In a small bowl, combine the smoked paprika, sweet paprika, garlic powder, onion powder, thyme, oregano, cayenne pepper, black pepper and salt. Stir well so the spices are evenly distributed.
- Season the cod: Pat the cod fillets dry with kitchen paper. Brush both sides lightly with olive oil, then press the spice mixture generously over each fillet, coating them well.
- Sear the fish: Heat a heavy frying pan over high heat until very hot. Add the butter and allow it to foam. Place the cod fillets in the pan and cook for 2 to 3 minutes on each side until a dark, crisp crust forms.
- Finish in the oven: Transfer the pan to the preheated oven and cook for a further 5 to 7 minutes, depending on thickness, until the fish flakes easily with a fork.
- Rest and serve: Remove from the oven and allow the cod to rest for a few minutes. Sprinkle with fresh parsley and serve with lemon wedges.

Tips
How do I stop the spices from burning?
Make sure the pan is hot but not smoking excessively. The dark crust should form quickly. If the heat is too high for too long, the spices can taste bitter.
How can I tell when the cod is cooked?
The fish should flake easily when pressed with a fork and appear opaque throughout. Avoid overcooking, as cod can dry out quickly.
Can I make it less spicy?
Simply reduce or omit the cayenne pepper for a milder version while keeping the smoky flavour from the paprika.
What pan works best?
A heavy-based frying pan or cast iron skillet gives the best crust and even heat distribution.
Serving Suggestions
- Serve with buttery new potatoes and steamed greens
- Pair with rice and a fresh tomato salsa
- Add to soft tacos with crunchy slaw
- Serve alongside a crisp green salad and garlic yoghurt dressing
Storage
At Room Temperature
This dish is best enjoyed fresh and should not be left out for more than 1 hour.
In the Refrigerator
Store cooled cod in an airtight container for up to 2 days. Reheat gently in the oven to maintain texture.
Freezing
Cooked cod can be frozen for up to 1 month. Wrap tightly and thaw overnight in the refrigerator before reheating. The texture may soften slightly after freezing.
Nutrition
- Calories: 320 kcal
- Carbohydrates: 3g
- Protein: 35g
- Fat: 18g
- Saturated Fat: 4g
- Sodium: 620mg
Nutrition values are estimates and may vary depending on portion size and ingredients used.
FAQs
Can I use another type of fish?
Yes, this seasoning works well with haddock, sea bass or salmon. Adjust cooking time depending on thickness.
Do I need a cast iron pan?
A cast iron pan gives the best crust, but any heavy frying pan that retains heat well will work.
Can I cook this without finishing in the oven?
If the fillets are thin, you can cook them entirely on the hob. Thicker fillets benefit from a short time in the oven.
Is blackened cod very spicy?
It has a gentle heat from cayenne, but you can reduce the amount for a milder flavour.
James Martin Blackened Cod
Course: Main CourseCuisine: BritishDifficulty: Easy4
servings30
minutes40
minutes300
kcal1
hour10
minutesSpiced blackened cod fillets with a smoky crust and tender flaky centre, finished with lemon and fresh parsley.
Ingredients
1 tbsp smoked paprika
1 tsp sweet paprika
1 tsp garlic powder
1 tsp onion powder
1 tsp dried thyme
1 tsp dried oregano
½ tsp cayenne pepper
½ tsp black pepper
1 tsp sea salt
4 cod fillets
2 tbsp olive oil
1 tbsp butter
Directions
- Preheat oven to 200°C (180°C Fan).
- Mix all spices together in a bowl.
- Brush cod with oil and coat evenly with the spice mixture.
- Heat butter in a hot pan and sear cod for 2–3 minutes per side.
- Transfer to oven and cook for 5–7 minutes until flaky.
- Rest briefly, garnish with parsley and serve with lemon.
Notes
- Pat the fish dry before seasoning for a better crust.
- Adjust cayenne to control the heat level.
- Best served fresh for optimum texture.
