Black puddings are often considered to be one of the oldest forms of sausage. Animals are generally bled at slaughter, and as blood rapidly spoils unless prepared in some way, making a pudding with it is one of the easiest ways of ensuring it does not go to waste. As a product of the slaughtering process, eating black puddings was historically associated with
Martinmas, when the annual slaughter of livestock took place. By the 19th century black pudding manufacture was linked with towns known for their large markets for pork, such as
Stretford, then in
Lancashire, and
Cork, Ireland. By this time, black puddings were generally omitted from recipe books aimed at urban housewives, as they no longer usually had access to home-killed pork, although recipes continued to appear in Scottish books until the 20th century. Most traditional recipes from the UK involve stirring the fresh blood, adding fat and some form of
rusk, and seasoning, before filling the mixture into a casing and boiling it. Natural casings of beef intestine were formerly used, though modern commercially made puddings use synthetic
cellulose skins, and are usually produced from imported dried blood. The relatively limited range of ingredients and use of oats or barley to thicken and absorb the blood is typical of black pudding in comparison to Continental blood sausages. Breadcrumbs or flour are sometimes used to supplement the oats or barley, and the proportion and texture of the fat or suet used can also vary widely.
Pennyroyal,
marjoram,
thyme, and
mint are all traditional flavourings: pennyroyal was known as
pudding-yerb in the
North Riding of Yorkshire for its use in black puddings. Other herbs and spices sometimes used in traditional black puddings include
cumin,
rue, and
parsley. While the dish has been known as
black pudding for centuries, having been recorded , a number of dialect names have also been used for the dish, such as
black pot (in
Somerset), and
bloody pot. ==Regional popularity==