The sugar cake of Lerma Food and drink · Lerma, Arlanza, Burgos Image of Lerma, not of the place itself. The town's confectionery carries the refined taste left by the ducal residence, and its best-known piece is the sugar tart: fine puff pastry covered with caramelised sugar, sold in the confectioners' shops of the old quarter. Photo: Palinka99 (CC BY-SA 3.0 es) What to see and do in Lerma