These Blackened Fish Tacos are flavorful, healthy, and simple to prepare. Firm white fish fillets are coated with a Cajun-style blackened seasoning, seared until tender, and served in warm tortillas topped with a crisp cabbage-mango slaw and a drizzle of lime crema for a bright finish.
✔️ Blackened Fish Tacos Recipe
If you love Baja-style fish tacos, this lighter blackened fish taco recipe will hit the mark. It skips the batter and deep-frying, relying instead on a spicy blackened rub and a hot skillet for a crisp, flavorful crust.
What makes this recipe great is its simplicity: a homemade or store-bought blackening seasoning, a quick skillet sear, and a fresh cabbage-mango slaw. Finish with a creamy cilantro-lime crema or a simple dollop of sour cream and a squeeze of lime.
⭐️ Why You Should Make This Recipe?
Use your favorite fish: Works well with any firm, mild white fish—tilapia, cod, halibut, mahi mahi, or flounder.
Shortcuts available: Use store-bought blackening seasoning, pre-shredded slaw mix plus diced mango or a jarred mango salsa to save time. Substitute lime crema with sour cream and lime if you prefer.
Big flavor: The blend of savory Cajun spices, crisp cabbage, and sweet mango creates a balanced, vibrant taco. Optional toppings like avocado or cotija cheese are great additions.
✔️ Ingredients
Refer to the recipe card for exact quantities. Key ingredients include:
- Fish: Any firm white fish such as tilapia, cod, halibut, or mahi mahi.
- Slaw: Thinly sliced cabbage (green, red, or a mix), ripe mango, tomato, red onion, cilantro, lime juice, honey, olive oil, and salt.
- Oil: Olive oil or another mild oil for searing.
- Tortillas: Soft corn tortillas.
- Blackening seasoning: Paprika, cayenne, onion powder, garlic powder, brown sugar (optional), dried thyme, basil, oregano, salt, and black pepper.
Lime Crema
A creamy, tangy drizzle that brightens the tacos. Prepare in advance and refrigerate.
🔎 How To Make These Fish Tacos
1. Mix the blackened seasoning: Combine the spices in a small bowl.
2. Season the fish: Sprinkle the seasoning over both sides of the fillets and set aside.
3. Make the mango slaw: In a large bowl, combine cabbage, diced mango, tomato, and red onion. Whisk lime juice, honey, and olive oil, pour over the slaw, then add cilantro and salt to taste. Toss and chill until serving.
4. Cook the fish: Heat 2 tablespoons olive oil in a cast-iron or large skillet over medium-high heat. Sear the fish 2–3 minutes per side until it flakes easily; the exterior will darken quickly—watch carefully to avoid burning.
5. Assemble tacos: Flake the cooked fish into pieces and divide among warmed tortillas. Top with mango slaw and a drizzle of lime crema. Garnish with lime wedges and chopped cilantro if desired.
🔎 What is Blackened Seasoning?
Blackened seasoning is a bold spice blend of smoked paprika, cayenne, garlic and onion powders, dried herbs, salt, and pepper. It’s similar to Cajun and Creole blends and can be made in small batches and stored airtight in a pantry.
Homemade Blackened Seasoning
If you prefer no-sugar seasoning, omit brown sugar and boost the savory spices to taste.
🔎 Best Fish for Fish Tacos
Mild, firm white-flesh fish work best: mahi mahi, cod, tilapia, halibut, grouper, or flounder. Choose fresh, firm fillets for best texture.
👀 Chef Tip: Testing Fish for Doneness
✔️ Quick Temperature Test
Fish is delicate and cooks fast. A thin skewer or toothpick inserted into the thickest part will conduct heat. Carefully test the probe against your cheek or wrist to gauge warmth—if it’s pleasantly warm the fish is cooked; if it’s cold, cook a bit longer. Use caution to avoid burns.
✔️ Additional Topping Ideas
The mango slaw and lime crema are delicious together, but these toppings also pair well:
- Avocado slices or guacamole
- Crumbled cotija or queso fresco
- Pickled or fresh jalapeños
- Chopped onions or tomatoes
- Sour cream and extra lime wedges
- Shredded lettuce in place of slaw
✔️ Make Ahead and Storage
Make ahead: Lime crema keeps up to a week in an airtight container. Season fish up to 4 hours ahead and refrigerate. Combine slaw ingredients without dressing and refrigerate overnight; make dressing up to 2 days ahead.
Storage: Leftover cooked fish will keep in an airtight container in the fridge for 2–3 days.
🔪 Blackened Fish Tacos Recipe Tips
- Choose ripe mangoes for the best slaw flavor.
- Warm corn tortillas on a skillet, grill, or wrapped in a damp paper towel in the microwave.
- Watch the fish closely—it cooks quickly and can go from perfect to overcooked fast.
- Use mild, firm white-flesh fish for best results.
Serving suggestions: Serve with tortilla chips, Mexican street corn salad, a bean salad, or charro beans for a full meal.
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Cast Iron 12-inch Skillet
Lodge cast iron skillet recommended for even searing and durability.
Blackened Fish Tacos
Kathy McDaniel
Pin
Equipment
- Cast iron skillet (10–12 inch)
Ingredients
For the Blackened Seasoning:
- 1 tablespoon ground paprika (regular or smoked)
- 1/2 teaspoon cayenne pepper (adjust to taste)
- 1 teaspoon onion powder
- 1 teaspoon garlic powder
- 1 teaspoon sea or kosher salt
- 1 teaspoon light brown sugar (optional)
- 1/4 teaspoon ground black pepper
- 1/2 teaspoon dried thyme
- 1/2 teaspoon dried basil
- 1/2 teaspoon dried oregano
For the Fish Tacos:
- 2 pounds tilapia or about six 5-ounce fillets (or other firm white fish)
- 2 tablespoons extra virgin olive oil
- 8–10 (6-inch) soft corn tortillas, warmed
- Lime wedges and chopped cilantro for serving (optional)
- Lime crema (optional)
For the Mango Slaw:
- 1 cup thinly sliced or shredded cabbage (green, red, or a mix)
- 1 large ripe mango, peeled and diced
- 1 medium tomato, diced
- 1/4 cup red onion, diced
- 1 tablespoon fresh lime juice
- 1 teaspoon honey
- 1 teaspoon olive oil
- 1–2 tablespoons fresh cilantro, chopped
- Salt to taste
Instructions
- Mix the blackened seasoning in a small bowl.
- Sprinkle seasoning evenly over both sides of the fish fillets and set aside.
- Combine cabbage, mango, tomato, and onion in a medium bowl. Whisk lime juice, honey, and olive oil; pour over slaw, stir in cilantro, and season with salt. Keep chilled until serving.
- Heat 2 tablespoons olive oil in a large skillet over medium-high heat. Cook fish 2–3 minutes per side until it flakes easily, watching closely as the exterior darkens quickly.
- Remove fish, break into pieces, and divide among warm tortillas. Top with mango slaw and lime crema. Garnish with lime wedges and cilantro.
Notes
- Any mild, firm white fish works well.
- Warm tortillas on a skillet, grill, or microwave wrapped in a damp paper towel.
- Fish cooks quickly—avoid overcooking.
- Omit brown sugar from the spice mix if you prefer no sugar.
- Lime crema is optional but highly recommended for brightness and creaminess.
Nutrition
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This post was originally published in 2018 and has been updated with new information and photography.