In small bowl, combine the light brown sugar, paprika, cumin, salt, garlic powder, thyme, black pepper and cayenne pepper. Rub the seasoning into the fish, making sure it's entirely coated.
Heat 1 tablespoon olive oil over medium-high heat in large skillet. Add fish to skillet and cook for 4 minutes per side or until blackened. Remove from skillet and top with corn mango salsa.
Notes
Multiply the spice mixture by 4X and then save the rest in a jar for later use.
Use wild cod when possible. It is healthier for you and just tastes better. Frozen cod works fine too but just make sure it is thawed before cooking.
Let the cod cook undisturbed for a few minutes on each side before flipping. This allows the spices to caramelize and develop flavor.
You know the cod is done when it flakes easily when pressed with a fork.