In a medium-sized bowl add the dry ingredients: flour, salt, sugar, baking soda and powder. Mix to combine
Cut the cold butter into the dry ingredients with a pastry knife. You could also cut into small pieces and break it in with your hands or use a handheld food processor to cut the butter in.
Add the buttermilk and stir until combined.
Knead the dough on a lightly floured countertop. Using a round cookie cutter or biscuit cutter, cut out biscuits and place on a light metal cookie sheet lined with parchment paper. Continue until all the dough is used.
With a pastry brush, top each uncooked biscuit with some buttermilk.
Place in the oven and bake for 14 minutes.
Remove from the oven and immediately rub the tops with a stick of butter while still hot.