01 - Preheat grill to medium-high heat, approximately 400°F (200°C).
02 - Combine softened butter, minced garlic, chopped parsley, salt, and black pepper in a small bowl until thoroughly blended.
03 - Brush each ear of corn evenly with a portion of the garlic butter mixture.
04 - Arrange corn on the grill and cook for 10 to 12 minutes, turning occasionally, until kernels are tender and lightly charred.
05 - Remove corn from grill and immediately brush remaining garlic butter on hot corn.
06 - Generously sprinkle each ear of corn with grated Parmesan while still hot, allowing cheese to melt slightly.
07 - Serve immediately, garnished with additional parsley if desired.