Preheat the oven to 425°F. Line a baking sheet with parchment paper.
In a large bowl, whisk together the flour, baking powder, salt, and sugar until combined.
Add the cold cubed butter to the dry ingredients. Use your fingers or a pastry cutter to work the butter into the flour until the mixture resembles coarse crumbs with some pea-sized pieces of butter remaining.
Pour in the milk and stir just until the dough comes together. Do not overmix.
Turn the dough out onto a lightly floured surface. Knead gently 3 to 4 times just until the dough is smooth. Pat or roll to about ¾ inch thickness.
Using a round biscuit cutter or the rim of a glass, cut out biscuits and place them on the prepared baking sheet with the sides touching slightly for soft-sided biscuits or spaced apart for crispier edges.
Bake at 425°F for 13 minutes until the tops are golden brown.
Serve warm.