Blackened Fish Fillets with Creamy Herb Sauce (Easy Recipe)

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Blackened Fish Fillets with Creamy Herb Sauce

If you are craving a restaurant-quality seafood dinner that comes together in under 25 minutes, these blackened fish fillets with creamy herb sauce are your ultimate answer. Featuring a smoky, perfectly spiced crust and a flaky, tender interior, this dish pairs harmoniously with a cool, tangy, and rich herb dipping sauce. Whether you use cod, mahi-mahi, or halibut, this quick weeknight recipe delivers massive flavor with minimal effort.

Let’s dive into how you can make this stunning, golden-brown masterpiece right in your own kitchen!

Why You Will Love This Recipe

  • Quick and Easy: Ready from scratch to table in just 20 minutes, making it ideal for busy weeknights.

  • Bold Flavor Profile: The smoky blackening spices create a wonderful contrast against the cool, refreshing homemade herb sauce.

  • Versatile: Works wonderfully with a wide variety of white fish fillets.

  • Low-Carb and Keto-Friendly: Naturally high in protein and healthy fats, fitting seamlessly into clean-eating meal plans.

Ingredients Needed

To recreate these sensational blackened fish fillets with creamy herb sauce, gather the following fresh components:

For the Blackened Fish Fillets:

  • 4 firm white fish fillets (cod, tilapia, or mahi-mahi), about 6 oz each

  • 2 tablespoons smoked paprika

  • 1 teaspoon garlic powder

  • 1 teaspoon onion powder

  • 1 teaspoon dried thyme

  • 1/2 teaspoon cayenne pepper (adjust to your preferred heat level)

  • 1 teaspoon sea salt

  • 1/2 teaspoon freshly cracked black pepper

  • 2 tablespoons unsalted butter and 1 tablespoon olive oil (for searing)

For the Creamy Herb Sauce:

  • 1/2 cup mayonnaise or Greek yogurt

  • 2 tablespoons sour cream

  • 1 tablespoon fresh lemon juice

  • 2 cloves garlic, finely minced

  • 2 tablespoons fresh parsley, finely chopped

  • 1 tablespoon fresh dill, chopped

  • Salt and pepper to taste

Step-by-Step Instructions

Step 1: Mix the Blackening Spice Blend

In a small bowl, combine the smoked paprika, garlic powder, onion powder, dried thyme, cayenne pepper, sea salt, and black pepper. Stir well until the spices are thoroughly blended.

Step 2: Prepare the Fish

Pat the fish fillets completely dry using paper towels. This crucial step ensures the spices stick evenly and helps achieve that gorgeous golden crust. Generously rub the spice mixture onto both sides of each fish fillet, pressing gently so the seasoning adheres.

Step 3: Whip Up the Creamy Herb Sauce

In a separate small bowl, whisk together the mayonnaise (or Greek yogurt), sour cream, fresh lemon juice, minced garlic, parsley, and dill. Season with a pinch of salt and pepper to taste. Cover and place in the refrigerator to let the flavors meld while you cook the fish.

Step 4: Sear the Fish Fillets

Heat a large cast-iron skillet over medium-high heat. Add the olive oil and melt the butter together. Once hot and shimmering, carefully place the seasoned fish fillets into the skillet. Cook for about 3 to 4 minutes on the first side without moving them, allowing a rich, dark crust to form.

Step 5: Flip and Finish

Gently flip the fillets and cook for an additional 2 to 3 minutes, or until the fish is cooked through, opaque, and flakes easily with a fork.

Step 6: Serve and Enjoy

Transfer the hot blackened fish fillets to a serving plate alongside a generous bowl of the chilled creamy herb sauce. Garnish with a sprinkle of fresh herbs and a lemon wedge.

Pro Tips for the Best Results

  • Use a Cast-Iron Skillet: Cast iron retains heat exceptionally well, which is essential for achieving that authentic blackened crust without burning the spices.

  • Dry the Fish Thoroughly: Excess moisture prevents the seasoning from sticking and can cause steaming instead of searing.

  • Control the Heat: If the spices start smoking too heavily or turning bitter, lower the heat slightly from medium-high to medium.

Frequently Asked Questions

Can I bake the fish instead of pan-searing? Yes! While pan-searing gives the best crust, you can bake the seasoned fillets at 400°F for 12 to 15 minutes until flaky.

What kind of fish works best? Thicker white fish fillets like cod, halibut, mahi-mahi, or snapper hold up best to the heavy seasoning and high

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