In a large bowl, whisk together the flour, baking powder, sugar and salt until well combined.
Stir in the buttermilk until a shaggy dough is formed. Don't over mix!
Pour the melted butter into an 8" x 8" square baking dish.
Place the dough into the baking dish on top of the butter.
Spread the dough evenly with a spatula.
Cut the unbaked dough in the pan into nine squares.
Bake at 450°F (230°C) for 20-25 min. *Bake at 425°F (220°C) if you're using a glass or dark metal pan
