Preheat the oven to 425°F.
Sift the flour into a large mixing bowl.
Add the baking powder, granulated sugar, baking soda, and salt to the flour and whisk together to combine.
Use a box grater to grate the frozen butter.
Add the grated butter to the flour mixture.
Using your hands or a rubber spatula, work the butter into the flour mixture until it is combined and looks flaky.
Make a well in the flour mixture and add the milk. Mix together to make the dough. Be careful not to over-handle the dough.
Turn the dough out onto a floured cutting board or pastry mat.
Using your hands, press the dough down to make a circle about 1 inch thick. You can also use a floured rolling pin to do this, although we suggest using your hands
Fold the dough halfway across, going from right to left. Then fold the other side over.
Press it down again to a 1-inch thick rectangle and then fold it over halfway, this time going from top to bottom. Then fold the bottom up.
Press the dough down again to a 1 inch thickness using your hands or a floured rolling pin.
Using a 2-inch pastry cutter or drinking glass, punch the biscuits out of the dough.
Combine the leftover dough to make additional biscuits.Depending on the size, you'll get 6-8 biscuits. Lightly grease a baking sheet and place the cut-out biscuits onto the sheet.
Brush the top of the biscuits with melted butter. Then, place the pan on the center rack of the preheated oven and bake for 15-17 minutes.
Remove the pan from the oven.
Place the biscuits on a wire rack to cool slightly. If you love butter, brush the tops of the biscuits with any remaining butter.
Serve hot with butter and your favorite jam or jelly.