01 - Preheat your oven to 425°F or prepare your grill to medium-high heat.
02 - In a small bowl, combine the softened butter, olive oil, smoked paprika, garlic powder, onion powder, dried oregano, dried thyme, cayenne pepper, ground black pepper, and kosher salt. Mix thoroughly until well combined.
03 - Gently pat the husked corn ears dry. Arrange them on a baking sheet lined with parchment paper, or place them directly onto the prepared grill.
04 - Using a pastry brush, generously apply the prepared Cajun butter mixture over all surfaces of each corn ear.
05 - Roast the corn in the preheated oven for 20 to 25 minutes, turning halfway through the cooking process, until the kernels are tender and exhibit a slight char. If grilling, cook for 12 to 15 minutes, rotating occasionally for even cooking.
06 - Remove the roasted corn from the oven or grill. Garnish with chopped fresh parsley or cilantro, and serve immediately with lime wedges for a fresh squeeze.