Preheat oven to 450° degrees F. Line a baking sheet with parchment paper.
In a large bowl, combine flour, sugar, baking powder, garlic powder and salt. Set aside.
In a small bowl, combine buttermilk and cooled, melted butter. Whisk together. Pour this mixture over the dry ingredients. Stir using a rubber spatula just until moistened. Fold in cheese.
Scoop batter with a 1/4 cup measuring cup onto the prepared baking sheet. Gently form and shape into biscuit. Repeat with remaining biscuit batter. Bake for 12 minutes, or until golden brown.
For the topping: Stir together the melted butter, garlic powder and parsley. Brush over the tops of each biscuit. Serve immediately.