Preheat the oven to 425°F (220°C). Line a baking sheet with parchment paper.
In a large bowl, whisk together the flour, sugar, baking powder, and salt until well combined.
Toss in cubed butter. Work it into the flour until the pieces are the size of peas to almonds.
Fold in the cold milk into the flour mixture until mostly moistened but still crumbly.
Turn the dough out onto a floured surface. Pat it into a 1-inch thick rectangle.
Fold the dough in half, cut it in half crosswise, and stack the halves on top of each other.
Repeat the folding, cutting, stacking, and patting process three more times.
Roll the dough to a thickness of ¾ to 1 inch and use a floured cutter to cut out the biscuits.
Place the biscuits on the prepared baking sheet and freeze for 20 minutes.
Bake for 20 minutes or until golden brown.
Brush with melted butter if desired. Enjoy them hot or store at room temperature for up to 3 days.