Preheat the oven to 375°F (190°C) and grease a muffin tin.
Roll out the crescent roll dough and brush with melted butter.
Mix sugar and cinnamon in a bowl and sprinkle evenly over the dough.
Tightly roll the dough into a log and cut into equal slices.
Place the slices into the muffin tin and bake for 15-18 minutes until golden brown.
Remove from the oven and let cool for 5 minutes before serving.