A bolus is a sweet pastry of Jewish origin from the Dutch province of Zeeland. They are made by baking dough in a spiral shape and covering it with treacle and cinnamon. The bolus was first created in Zeeland in the first half of the 17th century. There are, for as far as I know two varietys, the "Zeeuwse bolus" wich is the classic cinnamon bolus, and there is the " Ouddorpse bolus" wich is only baked on the island of Goerree-Overflakkee. This recipe is from the dutch baker Piet Daane, the recipe is freely available in Dutch.