Making these flaky rolls takes time: The dough needs to be chilled twice, for 40 minutes each time, and it must rise for an hour before baking.
Place butter in the bowl of an electric mixer fitted with the paddle attachment. Beat on low until butter is spreadable. Turn dough out onto a floured work surface. With a floured rolling pin, roll into another 10-by-25-inch rectangle. Spread with butter. Fold both 10-inch edges of dough into middle, then fold in half to form a rectangle that is about 10 by 6 inches. Wrap dough in plastic wrap; place on a baking sheet. Chill for 40 minutes.
On a floured work surface, roll dough into a 10-by-25-inch rectangle. Fold into quarters as in step 1. Wrap in plastic wrap; return to baking sheet. Chill 40 minutes more.
Line two large baking sheets with parchment. Roll dough into a 15-by-25-inch rectangle. Using a pizza wheel or a sharp knife, trim edges of dough so they are straight. Discard scraps. Cut rectangle lengthwise into four equal strips. Cut each strip into elongated triangles, about 3 inches wide at the base. Starting at the base of triangles, roll and shape into crescents. Transfer to prepared baking sheets, 1 inch apart. Cover with buttered plastic wrap. Set aside in a cool place to rise for 1 hour.
Heat oven to 350 degrees. Bake the crescents until golden and cooked through, about 20 minutes. Cool on a wire rack at least 5 minutes before serving.