Preheat oven to 450° Fahrenheit. Place butter in an 8x8-inch baking dish and place in the oven to melt. Keep a watch on the butter and do not let it burn. Once the butter has melted, remove it from the oven and let the oven finish heating.
Whisk together flour, sugar, baking powder, and salt in a large mixing bowl.
Pour buttermilk into flour mixture and mix with a spoon to form a shaggy dough.
Scoop 9 spoonfuls of biscuit batter into the pan of melted butter.
Cover baking dish with aluminum foil and bake for 15minutes.
Remove foil from baking dish and bake biscuits for an additional 10 minutes or until baked through and golden brown.
Remove from oven and allow biscuits to cool for 5 minutes before serving.