Preheat the oven to 375ºF. Grease an 8x11-inch baking dish with unsalted butter.
In a small bowl, stir together the cinnamon and sugar.
Lightly flour your work surface then roll out the dough into a 16x10-inch rectangle. Brush the dough all over with the melted butter then sprinkle it with the cinnamon-sugar mixture. Starting at the long end closest to you, tightly roll the dough into a log. Cut the log into 12 rolls, about 1 1/2-inches each. Arrange each roll in the prepared baking dish about 1 inch apart.
Bake the rolls for 20 to 25 minutes until the dough is fully cooked. (See Kelly's Notes.) Remove the rolls from the oven and let them cool slightly while you make the glaze.