The black pudding of Sotopalacios Food and drink · Merindad de Río Ubierna, Burgos (Alfoz), Burgos Image of Merindad de Río Ubierna, not of the place itself. Sotopalacios is one of the recognised producing centres of the morcilla of Burgos, made with onion, rice, blood, lard and spices. It is eaten fried, boiled or as a tapa, and gives its name to half the province beyond its borders. Photo: LBM1948 (CC BY-SA 4.0) What to see and do in Merindad de Río Ubierna