Preheat oven to 375 degrees F.
Unroll crescent roll dough into a rectangle; using a rolling pin, seal the seams.
Mix together cinnamon and granulated sugar; sprinkle over the crescent dough.
Roll up the dough (jelly-roll style), and seal the long edge.
Cut into eight roll slices.
Place rolls, cut-side down, into a 9-inch round baking dish that has been sprayed with cooking spray.
Bake for 12 to 15 minutes or until golden brown.
Optional: To make the glaze, mix confectioners sugar and milk.
Drizzle over warm rolls.