Masourakia is a traditional dessert hailing from the island of Chios. It consists of buttered phyllo kroustas (thin Greek pastry) that's rolled around a filling of mastic-flavored ypovríchio (a Greek sweet, also known as submarine), ground almonds, egg whites, and mandarin or lemon zest.
The pastry rolls are baked until crispy and lightly browned, and they are then either dusted with powdered sugar or soaked in flavored syrup before being coated with nuts (usually ground almonds) and sprinkled with powdered sugar on top. These sweet, crispy rolled pastries are commonly prepared for Christmas.