Ice cream is a delicious frozen dessert, a light and airy confection based on a base of cream and milk. It can also be flavoured with fruit and sweetener. Some types of ice cream are savoury. Savoury ices include beer ices and tea-flavoured ices.
The first ice cream was invented in the United States, by Jacob Fussell in Seven Valleys, Pennsylvania. He had leftover cream and milk from his dairy farm and started a small business making the dessert. As demand grew, he expanded his operation to several other cities.
There are six major components of ice cream: the cream, the fat, the liquid phase, the ice crystals, the air bubbles and the emulsifiers. All of these are used together to produce a smooth and creamy texture.
Milk and cream contain proteins which help form a stable emulsion. Fat creates a three-dimensional structure and prevents ice cream from rapidly collapsing when it melts. To ensure a smooth, creamy texture, food scientists are constantly experimenting with ice cream components.
When making ice cream, the cream and milk must be chilled before freezing. This makes the mixture more solid, and allows it to be drawn in about fifteen minutes using a batch freezer. The ice cream is then covered with greaseproof paper to prevent ice crystals from forming. Once frozen, the cream is stirred to ensure that the ice crystals stay smaller.
To prevent ice crystal formation, stabilizers are often added. These ingredients may include beet sugar, honey or cane sugar. Food coloring can also be added to the ice cream. Adding these bulky ingredients to a finished product may cause the 아이스팝니다 to spoil.
In the early American years, ice cream was only available to the upper classes, due to the time it took to make it. It was not until 1850 that Americans could obtain ready-made ice. During World War II, ice cream became a symbol of edible morale, and each military branch tried to outdo the other in serving ice cream to their troops.
A number of pathogens, including Salmonella, Listeria monocytogenes, and Escherichia coli O157:H7, can cause foodborne disease in ice cream. Other factors can also lead to ice cream spoilage. They can be found in raw dairy products, untreated water, and the environment. Moreover, ice cream made with these ingredients can be contaminated during shipment or at the point of sale. Therefore, it is important for consumers to understand the labeling of ice cream, and be sure that the product is free from allergens.
Another common cause of ice cream spoilage is the presence of bacteria and parasites. These organisms can be found in untreated water, dirt, or sewage sludge. Because ice cream is commonly served at low temperatures, the presence of these organisms can lead to an environment in which the ice cream can grow and become contaminated. For this reason, it is essential to store ice cream in a cool place and to keep the freezer free of contaminants.
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