You can either buy a premade jar of blackened seasoning or make your own by combining 2 tablespoons of smoked paprika, 1/2 tablespoon cayenne, 1/2 teaspoon white pepper, 1/4 teaspoon black pepper, 1/2 teaspoon oregano, 1/2 teaspoon salt, 1 tablespoon onion powder, and 1 teaspoon garlic powder.