Preheat the oven: Preheat your oven to 450°F and line a baking sheet with parchment paper so the biscuits release easily.
Whisk dry ingredients: In a large bowl, whisk together the flour, baking powder, salt, and garlic powder until evenly combined.
Cut in cold butter: Add the cold, cubed butter to the flour mixture and work it in with your fingers or a pastry cutter until the texture looks like coarse crumbs.
Stir in cheese: Fold the shredded cheddar cheese into the flour mixture, making sure it's distributed throughout.
Add buttermilk: Pour in the buttermilk and stir just until a soft, shaggy dough forms; avoid overmixing or the biscuits will turn out dense.
Scoop the dough: Use a large spoon or cookie scoop to drop rounded mounds of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake until golden: Bake for 12 to 14 minutes, until the tops are golden brown and the bottoms have set and lightly browned.
Make the garlic butter: While the biscuits bake, melt the butter and stir in the garlic powder and dried parsley.
Brush and serve: As soon as the biscuits come out of the oven, brush them generously with the warm garlic butter and serve while still warm.