A blood sausage made from pork blood, a high proportion of cereal (oats or barley), and spices; eaten at breakfast and combined in starters and salads.
blood sausage
noun
a cooked sausage made out of meat (most often pork), blood and various other regional ingredients
How often have the words black pudding and blood sausage occurred in a corpus of books? (source: Google Ngram Viewer )