Make the Biscuit Dough
Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper.
In a large bowl, whisk together the flour, baking powder, sugar, and salt until evenly combined.
Using a box grater, grate the frozen butter directly into the dry ingredients (this creates extra fluffy layers).
Use a fork or pastry cutter to gently mix the butter into the flour until it looks like coarse crumbs.
Pour in the cold milk and stir until a soft dough forms—do not overmix.
Turn the dough out onto a lightly floured surface.
Gently pat and fold the dough over itself 3–4 times (this creates flaky layers).
Pat the dough into a 1-inch thick rectangle and use a biscuit cutter or glass to cut out biscuits.
Place biscuits on the baking sheet, close together for softer sides or spaced apart for crispier edges.
Bake
Bake for 12–15 minutes, or until the tops are golden brown.
Brush warm biscuits with melted butter (optional but delicious).
Serve hot with butter, honey, jam, or your favorite breakfast sides.