Preheat oven to 450°F. A hot oven is key for a golden exterior and soft interior.
In a large mixing bowl, whisk together the flour, baking powder, and salt until evenly combined.
Add the cold cubed butter to the dry ingredients. Using a pastry cutter or your fingers, work the butter in until the mixture resembles coarse crumbs. Do not over-work — visible butter pieces are fine and create flakiness.
Make a well in the center of the mixture. Pour in the cold buttermilk and gently stir until just combined. Do not overmix.
Turn the dough out onto a floured surface. Gently knead a few times until it just comes together. Pat into a rectangle about ½ to ¾ inches thick.
Cut out biscuits using a round cutter or glass. Place on a parchment-lined baking sheet with biscuits close but not touching.
Bake for 10–12 minutes until golden brown on top. Watch closely to avoid over-baking.
Allow to cool for 2 minutes before serving. Best enjoyed warm with butter or your favorite jam.