Souring
Encyclopedia
Souring is a cooking technique that uses exposure to an acid
to effect a physical and chemical change in food. This acid can be added explicitly (for example, in the form of vinegar
, lemon juice
, lime juice, etc.), or can be produced within the food itself by a microbe such as Lactobacillus
.
Souring is similar to pickling
or fermentation
, but souring typically occurs in minutes or hours, while pickling and fermentation can take a much longer time.
Foods that are produced by souring include:
Acid
An acid is a substance which reacts with a base. Commonly, acids can be identified as tasting sour, reacting with metals such as calcium, and bases like sodium carbonate. Aqueous acids have a pH of less than 7, where an acid of lower pH is typically stronger, and turn blue litmus paper red...
to effect a physical and chemical change in food. This acid can be added explicitly (for example, in the form of vinegar
Vinegar
Vinegar is a liquid substance consisting mainly of acetic acid and water, the acetic acid being produced through the fermentation of ethanol by acetic acid bacteria. Commercial vinegar is produced either by fast or slow fermentation processes. Slow methods generally are used with traditional...
, lemon juice
Lemon juice
The lemon fruit, from a citrus plant, provides a useful liquid when squeezed. Lemon juice, either in natural strength or concentrated, is sold as a bottled product, usually with the addition of preservatives and a small amount of lemon oil.-Uses:...
, lime juice, etc.), or can be produced within the food itself by a microbe such as Lactobacillus
Lactobacillus
Lactobacillus is a genus of Gram-positive facultative anaerobic or microaerophilic rod-shaped bacteria. They are a major part of the lactic acid bacteria group, named as such because most of its members convert lactose and other sugars to lactic acid. They are common and usually benign...
.
Souring is similar to pickling
Pickling
Pickling, also known as brining or corning is the process of preserving food by anaerobic fermentation in brine to produce lactic acid, or marinating and storing it in an acid solution, usually vinegar . The resulting food is called a pickle. This procedure gives the food a salty or sour taste...
or fermentation
Fermentation (food)
Fermentation in food processing typically is the conversion of carbohydrates to alcohols and carbon dioxide or organic acids using yeasts, bacteria, or a combination thereof, under anaerobic conditions. Fermentation in simple terms is the chemical conversion of sugars into ethanol...
, but souring typically occurs in minutes or hours, while pickling and fermentation can take a much longer time.
Foods that are produced by souring include:
- DairyDairyA dairy is a business enterprise established for the harvesting of animal milk—mostly from cows or goats, but also from buffalo, sheep, horses or camels —for human consumption. A dairy is typically located on a dedicated dairy farm or section of a multi-purpose farm that is concerned...
- Smetana
- ClabberClabber (food)Clabber is a food produced by allowing unpasteurized milk to turn sour at a specific humidity and temperature. Over time, the milk thickens or curdles into a yoghurt-like substance with a strong, sour flavor. In rural areas of the Southern United States, it was commonly eaten for breakfast with...
- CheeseCheeseCheese is a generic term for a diverse group of milk-based food products. Cheese is produced throughout the world in wide-ranging flavors, textures, and forms....
- Crema
- Crème fraîcheCrème fraîcheCrème fraîche is a soured cream containing about 28% butterfat and with a pH of around 4.5. It is soured with bacterial culture, but is less sour than sour cream. It has a comparatively high viscosity and a higher fat content....
- Cultured buttermilk
- CurdCurdCurds are a dairy product obtained by curdling milk with rennet or an edible acidic substance such as lemon juice or vinegar, and then draining off the liquid portion. The increased acidity causes the milk proteins to tangle into solid masses, or curds. The remaining liquid, which contains only...
- KefirKefirKefir is a fermented milk drink that originated with shepherds of the North Caucasus region, who discovered that fresh milk carried in leather pouches would occasionally ferment into an effervescent beverage...
- PaneerPaneerPaneer is a fresh cheese common in South Asian cuisine. It is of Indian origin. In eastern parts of India, it is generally called Chhena...
- Soured milkSoured milkSoured milk is a food product, distinguished from spoiled milk, and is a general term for milk that has acquired a tart taste, either through the addition of an acid, such as lemon juice or vinegar, or through bacterial fermentation. The acid causes milk to coagulate and form a thicker consistency...
- Sour creamSour creamSour cream is a dairy product rich in fats obtained by fermenting a regular cream by certain kinds of lactic acid bacteria. The bacterial culture, which is introduced either deliberately or naturally, sours and thickens the cream. Its name stems from the production of lactic acid by bacterial...
- Yogurt
- GrainGRAINGRAIN is a small international non-profit organisation that works to support small farmers and social movements in their struggles for community-controlled and biodiversity-based food systems. Our support takes the form of independent research and analysis, networking at local, regional and...
products- Idli
- SourdoughSourdoughSourdough is a dough containing a Lactobacillus culture, usually in symbiotic combination with yeasts. It is one of two principal means of biological leavening in bread baking, along with the use of cultivated forms of yeast . It is of particular importance in baking rye-based breads, where yeast...
- Sour mashSour mashSour mash is a process in the distilling industry that uses material from an older batch of mash to start fermentation in the batch currently being made, analogous to the making of sourdough bread. The term sour mash can also be used as the name of the type of mash used in that process, and a...
- Others
- CevicheCevicheCeviche is a seafood dish popular in the coastal regions of the Americas, especially Central and South America. The dish is typically made from fresh raw fish marinated in citrus juices such as lemon or lime and spiced with chilli peppers. Additional seasonings such as onion, salt,...
- Key lime pieKey lime pieKey lime pie is an American dessert made of key lime juice, egg yolks, and sweetened condensed milk in a pie crust. The traditional Conch version uses the egg whites to make a meringue topping. The dish is named after the small key limes that are naturalized throughout the Florida Keys...
- Ceviche
See also
- Fermented milk productsFermented milk productsFermented milk products, also known as cultured dairy foods, cultured dairy products, or cultured milk products, are dairy foods that have been fermented with lactic acid bacteria such as Lactobacillus, Lactococcus, and Leuconostoc...
- AcidulatedAcidulatedAcidulated describes something that has been rendered acid or sour.* Acidulated drops are an old-fashioned candy similar to modern lemon and lime drops....
- Food preservationFood preservationFood preservation is the process of treating and handling food to stop or slow down spoilage and thus allow for longer storage....
- PicklingPicklingPickling, also known as brining or corning is the process of preserving food by anaerobic fermentation in brine to produce lactic acid, or marinating and storing it in an acid solution, usually vinegar . The resulting food is called a pickle. This procedure gives the food a salty or sour taste...
- MarinationMarinationMarination is the process of soaking foods in a seasoned, often acidic, liquid before cooking. The origins of the word allude to the use of brine in the pickling process, which led to the technique of adding flavor by immersion in liquid...