
Bold, smoky, and deeply satisfying, this blackened mahi-mahi is the kind of weeknight dinner that feels like it came from a restaurant kitchen. The magic is in the homemade spice blend — smoked paprika, garlic powder, onion powder, thyme, oregano, cayenne, and black pepper pressed firmly into each fillet before it hits a screaming-hot cast-iron skillet. That high-heat sear creates a gorgeous, deeply charred crust while keeping the fish tender and flaky inside. For anyone navigating grain-free eating, this recipe is naturally in the clear — every single ingredient is a whole food with zero hidden fillers or grain-based additives to second-guess. Avocado oil handles the high heat beautifully, and a squeeze of fresh lime at the end cuts right through the richness of the spice crust. It's a fast, confident cook that rewards you with serious flavor and almost no cleanup fuss.
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In a small bowl, combine the smoked paprika, garlic powder, onion powder, dried thyme, dried oregano, cayenne pepper, ground black pepper, and kosher salt. Stir until evenly mixed.
Pat the mahi-mahi fillets completely dry with paper towels. Brush both sides of each fillet with 1 tablespoon of the avocado oil, then press the spice blend firmly onto both sides of each fillet, coating evenly.
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