5.On a clean, well-floured surface, roll the dough out into a 16x10” rectangle. Brush with the melted butter, leaving a 1” border on the two longer sides. Sprinkle with the cinnamon sugar, leaving a 1” border on the two longer sides again. Carefully roll up the dough into a log, starting at one long edge and rolling towards the other one. Pinch the ends to seal. If the dough won’t stick together, gently brush the second longer edge with water before pinching to seal.