01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper or aluminum foil.
02 - In a small bowl, whisk together the melted butter, Cajun seasoning, smoked paprika, garlic powder, onion powder, cayenne pepper, salt, and black pepper until fully combined.
03 - Brush each ear of corn generously with the Cajun butter mixture, reserving approximately one-third of the butter for finishing after roasting.
04 - Arrange the buttered corn on the prepared baking sheet. Roast for 20 to 25 minutes, turning the ears once halfway through cooking, until the kernels are golden brown and lightly charred.
05 - Remove from the oven and brush with the remaining Cajun butter. Sprinkle with chopped fresh parsley and serve immediately with lime wedges on the side.