01 - Preheat your oven to 425°F or prepare your grill for medium-high heat, ensuring it's adequately hot for roasting or grilling.
02 - In a small mixing bowl, thoroughly combine the softened unsalted butter, olive oil, smoked paprika, garlic powder, onion powder, dried oregano, dried thyme, cayenne pepper, ground black pepper, and kosher salt until a uniform mixture is achieved.
03 - Gently pat the husked corn ears dry with a paper towel. Arrange them on a baking sheet lined with parchment paper for oven roasting, or place directly on the grill grates if grilling.
04 - Using a pastry brush, generously coat all surfaces of each ear of corn with the prepared Cajun butter blend, ensuring an even distribution.
05 - If oven roasting, cook for 20 to 25 minutes, rotating the corn halfway through, until the kernels are tender and exhibit slight charring. If grilling, cook for 12 to 15 minutes, turning occasionally to achieve even doneness and char marks.
06 - Carefully remove the roasted or grilled corn from the heat. Sprinkle generously with fresh chopped parsley or cilantro, and serve immediately with lime wedges for squeezing over the top to enhance the flavors.