Preheat the oven to 450 degrees. Line a large baking sheet with parchment paper.
In a medium bowl, whisk together flour, baking powder, garlic, powder, salt, and cayenne pepper.
In another small bowl or measuring cup, whisk together the buttermilk and melted butter. Pour the buttermilk mixture into the dry ingredients and use a sturdy spatula or wooden spoon to mix until it forms a ball. Stir in the shredded cheese.
Use about a 1/4 cup scoop to scoop out rounded portions of dough onto the prepared baking sheet. Bake for 10-12 minutes or until biscuits are no longer doughy when torn open.
Meanwhile, whisk together butter, parsley, garlic powder, and garlic salt in a small bowl. Use a pastry brush to brush the mixture onto the warm biscuits. Serve immediately.