01 - Preheat grill to medium-high heat, approximately 400°F.
02 - Combine softened butter, minced garlic, chopped parsley, salt, and black pepper in a mixing bowl until thoroughly blended.
03 - Lightly brush each ear of corn with part of the garlic butter mixture.
04 - Place corn on the grill and cook for 10 to 12 minutes, turning occasionally, until the kernels are tender and moderately charred.
05 - Remove corn from the grill and immediately brush generously with the remaining garlic butter.
06 - Sprinkle grated Parmesan cheese over the hot corn so it melts slightly.
07 - Serve at once, garnished with extra parsley if desired.