Heat oven to 450° F.
Cut up the butter and place it in a microwave safe dish. Set aside.
In a mixing bowl, stir together the flour, baking powder, salt, and sugar.
Stir in the buttermilk, just. until moistened.
Microwave the butter for 30 seconds, then check it. If not melted give it another 30 seconds. Pour the butter into the 8"x8" baking dish.
Add the dough to the baking dish, right into the melted butter. Then use your fingers to spread it into an even layer.
Cut into 9 equal pieces (this makes cutting after baking unnecessary, and allows the butter to get into every piece!).
Bake for 10 minutes, then turn the dish and bake for another 10 minutes, or until the tops are golden and the biscuits spring back when pressed.
Remove from the oven to a wire rack and let sit in the baking dish until al of the butter has been absorbed.
Serve hot with honey, maple syrup, extra butter, or plain, as they are delicious as is!