Rye bread is a type of bread made with various percentages of flour from rye grain. It can be light or dark in color, depending on the type of flour used and the addition of coloring agents, and is typically denser than bread made from wheat flour. It is higher in fiber than many common types of bread and is often darker in color and stronger in flavor.
The biochemistry of rye bread
While rye and wheat are genetically close enough to interbreed (the resulting hybrids are known as
triticale), there are some substantial differences in the biochemistry of wheat and rye that can drastically affect the breadmaking process. A key issue is
amylases - while wheat amylases are generally not heat stable and have no effect on the stronger wheat
gluten, rye amylase remains active at substantially higher temperatures. Since rye gluten is not particularly strong, the main structure of the bread is based on complex polysaccharides, including rye starch and
pentosans, and the amylases in the flour can break down the resulting structure, inhibiting the rise of the dough.
There are two common solutions: The traditional manner, acidification, uses Lactobacillus cultures in a naturally-derived sourdough starter to inactivate the rye amylases, which cannot function in an acidic environment, and to help gelatinize the starches in the dough matrix. In areas where obtaining wheat has traditionally been impractical because of marginal growing conditions or supply difficulties, this has been the most important technique to creating lighter breads. As a byproduct of this intentional cultivation of lactic acid and acetic acid from the sourdough bacteria, standard baker's yeast is not often used, since Saccharomyces cerevisiae is known to be rather intolerant of acid environments. (Commercial yeast can, however, still be used; recipes substituting citric acid or vinegar and commercial yeast for the sourdough culture are sometimes used in baking trades.)
In areas where high-gluten hard wheat is readily available, on the other hand, the need for a complex polyculture of bacteria and yeast can often be reduced or removed by adding a large proportion of hard wheat flour to the rye flour; the added gluten compensates for amylase activity on the starch in the bread, allowing it to retain its structure as it cooks. (The Jewish rye bread tradition in the United States is based upon this mixing of grains.) The use of high-gluten wheat flour also makes possible multigrain breads, such as the "rye and Indian" bread of the American colonies, which combined rye and wheat with cornmeal in one loaf.
Types
Pure rye bread contains only rye flour, without any wheat. German-style
pumpernickel, a dark, dense, and close-textured loaf, is made from crushed or ground whole rye grains, usually without wheat flour, baked for long periods at low temperature in a covered tin. Rye and wheat flours are often used to produce a rye bread which has a lighter texture, color and flavor than pumpernickel. 'Light' or 'dark' rye flour can be used to make rye bread; the flour is classified according to the amount of bran left in the flour after milling. Caramel or molasses for coloring and
caraway seeds are often added to rye bread (in the United States, breads labeled as "rye" nearly always contain caraway unless explicitly labeled as "unseeded"). Rye bread recipes typically include ground spices such as fennel, coriander, aniseed, cardamom, or
citrus peel. In addition to caramel and molasses, ingredients such as coffee or cocoa (or even toasted bread crumbs) can also be used for both coloring and flavor purposes for very dark breads like pumpernickels.
Straight rye breads
A simple, all-rye bread can be made using a sourdough starter and rye meal; it will not rise as high as a wheat bread, but will be more moist with a substantially longer keeping time. Such breads are often known as
black breads, partly from their darker color than wheat breads (enhanced by long baking times, creating
Maillard reactions in the crumb), and partly from their perceived lower social status than the lighter, more expensive wheat breads. The German
Vollkornbrot (whole grain bread) is something of an archetypical example, containing both rye meal and cracked whole rye grains (which are generally soaked overnight before incorporating into the dough). It is used both as an appetizer substrate for such things as smoked fish and caviar and as a sandwich bread. A very similar, but darker, bread, German-style
pumpernickel, has an even darker color derived from toasted leftover bread and other agents. Due to the density of the bread, the yeast in the starter is used at least as much for the fermentation character in the bread itself as it is for leavening. Danish
rugbrød (rye bread), another archetypical example, is typically made with sour dough, with either straight rye flour, or mixed with whole and/or cracked rye kernels. Any breads containing wheat flour is not considered
rugbrød, but
white bread. A variety of seeds, such as pumpkin, poppy and caraway, may be added for taste.
Rugbrød is a staple lunch food, typically eaten topped with cold or warm fish and meats, cheese or any other
cold cut.
As stated above, all-rye breads may have very long keeping times, measured in months rather than days, and are popular as storage rations for long boat trips and outdoors expeditions. Such breads are usually sliced very thin because of their density, sometimes only a few millimeters thick, and are sold presliced in this manner.
Multigrain rye breads
It is fairly common to combine rye with other grains and seeds. In southern Germany and Switzerland, for example, it is not uncommon to find a variant of
Vollkornbrot with
sunflower seeds instead of the rye seeds, and some traditional recipes also substitute whole
wheat grains for the rye grains. In the colonial era in
North America, particularly in the
United States, it became common to mix rye and
cornmeal in what was known as "rye and Indian" or, if wheat flour was added, "thirded" bread; the resulting bread, though less dense than a whole-rye bread, was still heavier than the more expensive wheat-only breads that later became commonplace.
In England, a mixed rye/wheat bread known as maslin (or several other variants of the name) was the bread of the peasants for hundreds of years, in contrast to the manchet bread eaten by the rich.
Wheat-rye breads, particularly light rye (sissel) and American pumpernickel, but also a combination known as "marble rye", are very closely associated with Jewish-American cuisine, particularly the delicatessen. The bulk of the flour is white wheat flour (often a less-refined form known as "first clear"), with a substantial portion of rye mixed in for color and flavor. The dough is often, but not necessarily, leavened, in whole or in part, with sourdough, but sometimes uses a small addition of citric acid or vinegar to achieve the lowered pH needed to neutralize the rye amylases; so-called "Jewish rye" is further seasoned with whole caraway seeds and glazed with an egg wash, and is traditionally associated with salted meats such as corned beef, pastrami, and (outside kosher circles) ham. High-gluten wheat flour can be used with rye flour to make a dough suitable for bagels, as well. Jewish-style American rye bread is sometimes referred to as "corn bread" or "corn rye"; the term comes from the use of cornmeal as a coating and handling aid and does not necessarily imply the use of cornmeal within the dough itself as in rye and Indian.
The Jewish-American variety has Eastern European antecedents, including Russian-style brown bread and Riga-style rye bread. In Scandinavia, similar breads are made, some of which also include sweeteners and/or citrus peel, as well as spices such as anise, fennel or cardamom, when made for more festive occasions (such as in the Swedish limpa).
In Canada, Winnipeg-style rye bread does not actually contain much, if any, rye flour. Instead, this Jewish and Slavic influenced bread is made from from cracked rye or coarse rye meal added to wheat flour, often flavored with caraway and other herbs.
Crisp rye flatbreads
There are three different types of rye crisp bread:
yeast fermented,
sourdough fermented and cold bread crisp bread. Most of the crisp bread produced in
Scandinavia is baked following three to four hours of fermentation. Sourdough crisp breads are used in
Finland,
Estonia,
Latvia,
Lithuania,
Poland,
Germany and
India. The third type of crisp bread is the so-called cold bread crisp bread, essentially a type of
hardtack (known in Sweden particularly as
knäckebröd), which is baked without the addition of any leavening. The dough gets the right texture from a foaming process, where air is incorporated into the cooled dough, which also leads to the almost white color of the finished bread. Crisp bread owes its long shelf life to its very low water content (5-7%).
One of the largest producers of rye flatbreads, and one of the most prominent in overseas markets, is the Swedish-founded company Wasabröd.
Rye quick breads
Rye flour is sometimes used in chemically-leavened
quick bread recipes as well, either batter-type or dough-type (similar to
Irish soda bread). In such cases, it can be used in similar applications as whole wheat flour, since an egg matrix often provides the bread structure rather than the grain's gluten.
Health benefits
Rye bread contains a large amount of fiber and only a little fat. Rye bread does not
create high spikes in
blood sugar as white bread and other breads do.
History
Dark rye bread became a staple which lasted to the Middle Ages. Many different types of rye grain have come from places all over Europe such as
Finland,
Denmark,
Russia,
Baltic countries and
Germany. In
Finland,
Estonia,
Latvia,
Lithuania,
Denmark,
Poland,
Belarus,
Slovakia, and
Russia, rye is the most popular type of bread. A common saying in modern-day Alaska is "eggs on rye," which is an expression used when something tastes delicious. In 500 AD., the
Saxons and
Danes settled in Britain and introduced rye, which was well suited to cold northern climates.
Uses
Rye is a popular bread for sandwiches. In the United States,
corned beef or
pastrami on rye is particularly popular; it is considered a classic element of Jewish-influenced New York City cuisine. One common form of this combination is the
reuben sandwich.
See also
Pumpernickel
Ruisleipä
Rugbrød
The Rye Bread Radio Show
References
Category:Breads
