Preheat oven to 425°F (220°C). Line a baking sheet with parchment paper.
In a large bowl, whisk together flour, baking powder, and salt.
Add cold butter and cut it into the flour until the mixture looks crumbly with pea-sized pieces.
Pour in milk and gently mix just until the dough comes together.
Turn dough onto a lightly floured surface and pat to about ¾-inch thickness.
Cut biscuits using a round cutter and place them close together on the baking sheet.
Bake for 12–15 minutes, or until tops are lightly golden.
Serve warm, brushed with melted butter if desired.