Blackened Flounder with Pineapple Salsa
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Lightly spicy, with a crispy crust, blackened flounder is a simple but super flavorful fish dinner. It’s easy to pan sear and cooks up in just a few minutes for a delicious weeknight meal.

The flounder is seasoned generously with a blend of spices and herbs, cooked quickly either in a pan or on the grill, and served with a juicy pineapple salsa, cauliflower rice, and a cooling chili-lime drizzle.
During the summer heat especially, the spicy and sweet combination of flavors is everything– Just check out my grilled halibut recipe!
⭐️ ⭐️ ⭐️ ⭐️ ⭐️
Made this for dinner tonight and it was the PERFECT Whole30 summer dinner!! I added some red onion to the salsa and made everything else exactly as listed – so flavorful and refreshing!
–Alden

How to Blacken Flounder
Surprisingly, it’s almost impossible to mess this recipe up, so if you’re newer to cooking, this would be a great recipe to try!
Make the Blackening Seasoning
This recipe starts with a fabulous homemade Blackened Seasoning blend. It’s lightly spicy with great depth of flavor, and it compliments the flounder and the pineapple salsa wonderfully. It’s awesome on blackened salmon, too!

Making your own spice blends is a great way to make sure they’re made with only clean ingredients, and it’s cheaper too! Some of my other favorite blends are my homemade taco seasoning and ranch seasoning.
Season and Blacken the Fish
Once you’ve got your seasoning blend ready, gently pat each flounder filet dry with paper towels. I like to cut the fillets in half, but that’s completely optional!
Season the fish generously with the blackened seasoning and a little oil, rubbing it on all sides of each fillet to evenly coat.

In batches, grill the flounder over medium-high heat in a well oiled skillet or grill, turning once, just until cooked through.
Remember, it’s really easy to overcook fish! But the more you cook, the more familiar you’ll get with cook times, but it still happens to even the most seasoned cooks!
The other elements in this dish make it a very forgiving recipe. Even if you find your fish a tad overdone, don’t stress! Once you put everything together, no one will even notice!

Make the Pineapple Avocado Salsa
The pineapple avocado salsa adds a beautiful burst of acid and brightness for fish dishes. It’s great all by itself, too! Personally, I love it with some plantain chips or crunchy veggies.
The pineapple salsa is very easy to make – it just involves a bit of chopping! You can even make it in advance! Mix everything together except for the avocado, season to taste, and you’re good to go. Just before serving, dice the avocado and stir it in. This will keep it from browning.

If you’re feeling extra fun, try this dish with pickled pineapple. YUM is all I can say about it!
Awesome!!! Just made it and love it, husband loves it too! Yay! Thank you for sharing. 🙂
–Kim

Assemble and Serve the Blackened Flounder
Once you’ve got all the elements ready, all that’s left to do is put it together! Grab four plates or bowls and slice up a few limes as garnish.
Serve the fish over cauliflower rice with a healthy serving of pineapple avocado salsa, some chili-lime drizzle, and a little extra cilantro. Enjoy!

Other Easy Fish Recipes
- Chicken Fajita Stuffed Peppers
- Thai Beef Lettuce Wraps
- Pineapple Pork Chops (Instant Pot)
- Baked Salsa Chicken
- Tuna Salad with Habanero
I’d love to hear about your experience making this recipe! Please leave a comment and rating below!

Blackened Flounder with Pineapple Salsa
Ingredients
- 4 large flounder filets or any other whitefish (about 6 ounces per fillet)
- 2 tablespoons olive oil
Blackened Seasoning
- 1½ tablespoons cumin
- 1½ tablespoons chili powder
- ½ tablespoon paprika
- 2 teaspoons onion powder
- 2 teaspoons garlic powder
- ½ teaspoon oregano
- ½ teaspoon sea salt
- ¼ teaspoon black pepper
Pineapple Salsa
- 1 pineapple
- 2 avocados
- 1 tablespoon lime juice 1 lime
- 1 bunch cilantro
- ½ cup diced tomatoes
- salt and black pepper to taste
Chili-Lime Drizzle
- ½ cup coconut milk
- 1 teaspoon lime juice
- ¼ teaspoon chili powder
- ¼ teaspoon sea salt
- ¼ teaspoon black pepper
Video
Instructions
- Stir all the blackening seasonings together in a small bowl. Set aside.
- Dice the pineapple and roughly chop the cilantro. Quarter the tomatoes and avocado. Mix all the ingredients together in a large bowl and season with salt and pepper to taste.
- Pat the fish fillets dry with paper towels. Optional: Cut each fillet in half. Drizzle the fish with oil, then sprinkle all sides with blackening seasoning. Rub the seasoning into the fish to fully coat it on all sides. Pan fry in a large skillet over medium high heat for about 2 minutes per side.
- Make the chili lime drizzle by stirring all of the ingredients together in a small bowl.
- Divide the cauliflower rice among four bowls. Top with the blackened fish, pineapple salsa, and spoon on the chili lime drizzle. Serve with a slice of lime and a few extra cilantro leaves.


This was a tasty hit your spice mix on “sea bass”. Even my mom who hates fish ate it. I didn’t do the salsa, but served it with Mexican cauliflower rice, Salvadorean curtido and a dollop of romesco sauce on top of the fish. Delish!
Love your site and how you organize it. Fixing my insulin resistance issue seems a whole lot easier and tastier with your recipes and ideas – esp on batch prepping.
Hi Ez! I’m thrilled to hear even your mom loved the spice blend, and I love the sides you chose to pair it with! Thank you so much for the kind words. -Laura
I love the pineapple salsa and seasonings used for this delightful flounder.
Hi Alyse, I’m so glad to hear that! It’s one of my favorite recipes too. 🙂 -Laura
Awesome!!! Just made it and love it, husband loves it too! Yay! Thank you for sharing. 🙂
Hi Kim, thank you so much for sharing! I’m thrilled you and your husband enjoyed this recipe!!! -Laura
Made this for dinner tonight and it was the PERFECT Whole30 summer dinner!! I added some red onion to the salsa and made everything else exactly as listed – so flavorful and refreshing!
Hi Alden, Thank you so much for sharing. I’m thrilled to hear you enjoyed it!! -Laura
Adding this to my meal plan this week!
That’s awesome! Hope you enjoy it! -Laura