Preheat Oven: Set to 425°F (220°C).
Combine Dry Ingredients: In a mixing bowl, whisk flour, baking powder, sugar, and salt.
Incorporate Butter: Add cold butter cubes and blend until mixture resembles coarse crumbs.
Add Buttermilk: Stir in buttermilk gently until just combined. Avoid overmixing.
Shape Dough: Turn dough onto a floured surface, pat to 1-inch thickness, and cut with a biscuit cutter.
Bake: Arrange biscuits on a parchment-lined baking sheet and bake for 12-15 minutes until golden brown.
Serve: Optionally, brush with melted butter before serving.