Its squashed shape comes from pressing a wooden stick or spoon handle across the middle of each rolled slice before baking, which pushes the cinnamon layers out at both ends.
A laminated, buttery dough is rolled with cinnamon sugar, then pressed flat into a squashed spiral before baking, giving it crisp caramelized edges and a soft center. It's a breakfast and coffee-break fixture sold from bakery counters and train-station kiosks all over the city.