A cinnamon roll is a sweet roll from Sweden. The Swedish word for it is kanelbulle.
A cinnamon roll is a rolled sheet of dough onto which a cinnamon and sugar mixture (or other ingredients) is mixed with butter. The dough is rolled, cut and baked. The deep fried version is called a cinnamon bun doughnut. Its ingredients are flour, cinnamon, sugar, and butter, which provide flavor.