Pumpernickel

Pumpernickel (English: /ˈpʌmpərnɪkəl/; German: [ˈpʊmpɐˌnɪkl̩] ) is a typically dense, slightly sweet rye bread traditionally made with sourdough starter and coarsely ground rye. It is sometimes made with a combination of rye flour and whole rye grains ("rye berries").
At one time it was traditional peasant fare, but largely during the 20th century various forms became popular with other classes through delicatessens and supermarkets. Present-day European and North American pumpernickel differ in several characteristics, including the use of additional leaveners. The less dense North American version may eschew rye grains, have coloring and flavoring agents, added wheat flour, glazed crust, a higher baking temperature, and a dramatically shortened baking time.
The philologist Johann Christoph Adelung (1732–1806) states that the word has an origin in the Germanic vernacular, where pumpern was a New High German synonym for being flatulent, and Nickel was a form of the name Nicholas, commonly associated with a goblin or devil (e.g. Old Nick, a familiar name for Satan), or more generally for a malevolent spirit or demon. Hence, pumpernickel means "farting devil" or "devil's fart", a definition accepted by the publisher Random House, and by some English language dictionaries, including the Merriam-Webster Dictionary. The American Heritage Dictionary adds "so named from being hard to digest". A variant of this explanation is also given by the German etymological dictionary Kluge that says the word is older than its usage for this particular type of bread, and may have been used as a mocking name for a person of unrefined manners (a "farting Nick") first. The change of meaning may have been caused by its use as a mocking expression for the (in the eyes of outsiders) unrefined rye bread produced by the Westphalian population.
The Oxford English Dictionary does not commit to any particular etymology for the word. It suggests it may mean a lout or booby, but also says "origin uncertain". The second edition of the OED states the first use of the word in English in the works of writer and surveyor, Thomas Lediard, in 1738.
Chambers's Twentieth Century Dictionary gives the etymology as being the German word for a rackety goblin, a coarse lout, and rye-bread – possibly from its giving forth a sound like pump when struck.
Pumpernickel has been long associated with the Westphalia region of Germany, first referred to in print in 1450. Although it is not known whether this and other early references refer to precisely the bread that came to be known as Pumpernickel, Westphalian pumpernickel is distinguished by use of coarse rye meal and a very long baking period, which gives the bread its characteristic dark color. Like most traditional all-rye breads, pumpernickel is made with an acidic sourdough starter, which preserves dough structure. The acid inactivates the rye protein, amylase, which converts the starch to sugar. That sourdough starter is sometimes augmented, or replaced, in commercial baking by adding citric acid or lactic acid along with commercial yeast.
Traditional German pumpernickel contains no coloring agents, instead relying on the Maillard reaction to produce its characteristic deep brown color, its sweet, dark chocolate, coffee flavor, and its earthy aroma. To achieve this, loaves are baked in long narrow lidded pans 16 to 24 hours in a low-temperature, about 120 °C (250 °F), steam-filled oven. Like French sandwich bread, or a Pullman loaf, Westphalian pumpernickel has little or no crust. It is very similar to rye Vollkornbrot, a dense rye bread with large amounts of whole grains added. German pumpernickel is often sold sliced in small packets in supermarkets, where it may be paired with caviar, smoked salmon, sturgeon, and other expensive products on an hors d'oeuvres tray.
Pumpernickel varieties are popular in the Netherlands, where it has been a common part of the diet for centuries. It is known there as Fries roggebrood or 'Frisian rye bread', as this variety of rye bread originates in the Dutch province of Friesland, and is significantly different from, for example, Brabants roggebrood, rye bread made with yeast, from the province of North Brabant.
The term "pumpernickel" is often used in North America, especially in the United States, to refer to an airy style of dark-colored wheat-and-rye sandwich bread or bagel originally popularized by Ashkenazi Jewish delis. These products often forgo the sourdough starter, long bake times, and steaming, and instead use baker's yeast and short dry bakes that do not allow for the same degree of Maillard browning as traditional German methods. To compensate, ingredients such as molasses, caramel color, coffee, and cocoa powder are added for both color and flavor. Some shops and bakeries, especially those in Canada, do use recipes that produce a traditional dense loaf.