Each chestnut is slit before roasting so steam can escape — without the cut, chestnuts can burst in the drum.
Chestnuts are slashed, roasted over coals in a perforated drum, and scooped hot into paper cones. Vendors set up braziers along Belgrade's central boulevards from late autumn through winter.
Why it's made this way: Cheap, portable, and warming, roasted chestnuts became the default cold-weather street snack across the old Austro-Hungarian and Ottoman-adjacent cities of the Balkans, Belgrade included.