01 - Preheat grill to medium-high heat (approximately 400°F).
02 - Whisk together melted butter, parsley, chives, and dill in a small bowl until thoroughly combined.
03 - Mix parmesan cheese, ranch seasoning, garlic powder, and black pepper in a separate bowl.
04 - Brush each ear of corn generously with the herb butter mixture, ensuring even coverage.
05 - Place corn directly on grill grates. Cook for 12–15 minutes, rotating every 3–4 minutes, until kernels are tender and lightly charred.
06 - Remove corn from grill and immediately press the parmesan-ranch mixture evenly onto each ear while hot.
07 - Transfer to a serving platter and garnish with additional chopped herbs if desired. Serve warm.