Mix and knead all of the ingredients — by hand, mixer, or bread machine — to make a soft, smooth dough.
Cover the dough and let it rise until it's nearly doubled in bulk, about 1 to 2 hours.
Gently deflate the dough and divide it into eight pieces (about 4oz each) Shape each piece into a ball.
Flatten each dough ball with the palm of your hand.
Place the buns on a parchment-lined baking sheet. Cover and let rise until noticeably puffy, about an hour. Toward the end of the rising time, preheat the oven to 375°F.
Bake the buns for 12 - 15 minutes, until golden. Remove them from the oven and brush with melted butter; this will give the buns a soft, buttery crust.
Cool the buns before slicing in half, horizontally.
Store leftover buns, well-wrapped, at room temperature for several days; freeze for longer storage.