Weigh your flour; or measure it by gently spooning it into a cup, then sweeping off any excess. Mix and knead together all of the dough ingredients, using your hands, a stand mixer, or a bread machine set on the dough cycle. The dough should be soft but not overly sticky.
Put the dough into a lightly greased bowl, and cover the bowl with plastic wrap. Let the dough rise until it's doubled in bulk, about 1 1/2 hours.
Gently deflate the dough, and divide it in half.
Roll one piece of the dough into a circle 8" to 9" in diameter. Cut the dough into 9 triangles (as if you were cutting a pie).
Roll each triangle into a crescent shape, starting with the curved side and rolling toward the point.
Place the crescents on a parchment-lined or greased baking sheet. Make sure that the tip of the crescent is pinched well to attach it to the roll, and that it's positioned underneath the roll.
Curve the ends to form a gentle C-shape. Repeat with the remaining triangles, brushing them all with melted butter.
Roll out, cut, and form the remaining piece of dough.
Cover the crescents with a piece of greased plastic wrap and let them rise for 25 to 35 minutes, or until puffy but not quite doubled in size.
While the rolls are rising, preheat the oven to 350°F.
Bake the crescents for about 20 minutes, or until golden brown. Remove them from the oven. Brush with additional melted butter, if desired. Serve rolls warm or at room temperature.
Store rolls, well wrapped, at room temperature for up to three days; freeze for longer storage.