Preheat your oven to 450°F.
Prepare a baking sheet by lining it with parchment paper.
In a large bowl, combine the flour, baking powder, and confectioners sugar.
Blend them well to avoid any lumps.
Add the shortening to your dry ingredients and use a pastry cutter or two knives to cut it in.
The mixture should resemble coarse crumbs.
Pour in the buttermilk and gently mix until it forms a soft dough.
Be careful not to over-mix to keep your biscuits light.
Turn the dough onto a floured surface.
Pat it down to about 1/2 inch thick.
Use a biscuit cutter to cut out your biscuits.
Place the biscuits on the prepared baking sheet.
Brush the tops with melted butter.
Bake in the preheated oven for 10-12 minutes until golden brown.