The towers are fondant which were wrapped around sprinkle containers and glued with edible glue along the back seam. Once dry enough to support their own weight (24hrs..ish) I removed the sprinkle containers (these were wrapped in greasproof first) to allow the air to dry the insides. I didn;t use any supports as the roof tops were made from wafer cones covered in fondant and didn’t weigh much. Hope this helps :)
