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Ice cream

Ice cream is a frozen dessert typically made from milk or cream that has been flavoured with a sweetener, either sugar or an alternative, and a spice, such as cocoa or vanilla, or with fruit, such as strawberries or peaches. Food colouring is sometimes added in addition to stabilizers. The mixture is cooled below the freezing point of water and stirred to incorporate air spaces and prevent detectable ice crystals from forming. It can also be made by whisking a flavoured cream base and liquid nitrogen together. The result is a smooth, semi-solid foam that is solid at very low temperatures. It becomes more malleable as its temperature increases.

History
Early frozen desserts The origins of frozen desserts are obscure, although several accounts exist about their history. Some sources say the history of ice cream begins in Persia in 550 BC. A Roman cookbook dating back to the 1st century includes recipes for sweet desserts that are sprinkled with snow, 's origin is referred to in The Pillow Book, a book of observations written by Sei Shōnagon, who served the Imperial Court during the Heian period. The earliest known written process to artificially make ice is known not from culinary texts, but the 13th-century writings of Syrian historian Ibn Abi Usaybi'a in his book "Kitab Uyun al-anba fi tabaqat-al-atibba" (Book of Sources of Information on the Classes of Physicians) concerning medicine in which Ibn Abi Usaybi'a attributes the process to an even older author, Ibn Bakhtawayhi, of whom nothing is known. Ice cream production became easier with the discovery of the endothermic effect. Prior to this, cream could be chilled easily but not frozen. The addition of salt lowered the melting point of ice, drawing heat from the cream and allowing it to freeze. Early modern in a matka pot from India In the 16th century, the Mughal Empire used relays of horsemen to bring ice from the Hindu Kush to its capital, Delhi, used to create kulfi, a popular frozen dairy dessert from the Indian subcontinent often described as traditional Indian ice cream. Although Delhi has been described as the birthplace of kulfi, Australian food historian Charmaine O'Brien suggests : "...it is likely that [kulfi] originally evolved in the cooler climates of Persia or Samarkand and that the Mughals appropriated the concept and elaborated on it to create the creamy, perfumed dessert that it now is." Europe The technique of freezing was not known from any European sources prior to the 16th century. Ice cream's spread throughout Europe is sometimes attributed to Moorish traders, but more often Marco Polo. Though it is not mentioned in any of his writings, Polo is often credited with introducing sorbet-style desserts to Italy after learning of them during his travels to China. However, no Italian chefs were present in France during the Medici period, and ice cream already existed in France before de Medici was born. One hundred years later, Charles I of England was reportedly so impressed by the "frozen snow" that he offered his own ice cream maker a lifetime pension in return for keeping the formula secret, so that ice cream could be a royal prerogative. There is no evidence to support these legends. France In 1665, the , edited in Montpellier by Jean Fargeon, listed a type of frozen sorbet. While the composition of this sorbet is not provided, Fargeon specified that it was consumed frozen using a container that was plunged into a mixture of ice and saltpetre. These sorbets were transported in pots made of clay and sold for three livres per pound. According to , the practice of cooling drinks with ice and snow had already emerged in Paris, particularly in the court, during the 16th century. The narrator notes that his hosts stored ice and snow, which they later added to their wine. This practice slowly progressed during the reign of Louis XIII and was likely a necessary step towards the creation of ice cream. In 1682, provided a recipe for a specific type of ice cream, called . The first recipe in French for flavoured ices appears in 1674, in Nicholas Lemery's . Recipes for saw publication in the 1694 edition of Antonio Latini's (The Modern Steward). Recipes for flavoured ices begin to appear in François Massialot's , starting with the 1692 edition. Massialot's recipes result in a coarse, pebbly texture. Latini claims that the results of his recipes should have the fine consistency of sugar and snow. The only table at the banquet with ice cream on it was that of the King. The first recipe for ice cream in English was published in ''Mrs. Mary Eales's Receipts,'' in London in 1718: by M. Emy, in 1768, was a cookbook devoted to recipes for flavoured ices and ice cream. His shop was at the Sign of the Pineapple (an emblem used by confectioners) and his trade card said he sold "All Sorts of English, French and Italian wet and dry'd Sweet Meats, Cedrati and Bergamot Chips, Naples Diavoloni, All sorts of Baskets & Cakes, fine and Common Sugar plums", but most importantly, "all Sorts of Ice, Fruits and creams in the best Italian manner." North America An early North American reference to ice cream is from an account in 1744 of a dinner held by governor Thomas Bladen and his wife: "...after which came a Dessert no less Curious. Among the Rarities of which it was Compos'd, was some fine Ice Cream, which, with the Strawberries and Milk, eat most Deliciously." Confectioners sold ice cream at their shops in New York and other cities during the colonial era. Benjamin Franklin, George Washington, and Thomas Jefferson were known to have regularly eaten and served ice cream. Records, kept by a merchant from Chatham street, New York, show George Washington spending approximately $200 on ice cream in the summer of 1790. The same records show president Thomas Jefferson having an 18-step recipe for ice cream. Although it is incorrect that Jefferson introduced ice cream to America, as is popularly believed, he did help to introduce vanilla ice cream. First Lady Dolley Madison, wife of U.S. President James Madison, served ice cream at her husband's Inaugural Ball in 1813. Small-scale hand-cranked ice cream freezers were invented in England by Agnes Marshall and in America by Nancy Johnson in the 1840s. Expansion in popularity , "queen of ices", instrumental in making ice-cream fashionable surround an ice cream vendor in 1909. In the Mediterranean, ice cream appears to have been accessible to ordinary people by the mid-18th century. Ice cream became popular and inexpensive in England in the mid-19th century, when Swiss émigré Carlo Gatti set up the first stand outside Charing Cross station in 1851. He sold scoops in shells for one penny. Prior to this, ice cream was an expensive treat confined to those with access to an ice house. Gatti built an 'ice well' to store ice that he cut from Regent's Canal under a contract with the Regent's Canal Company. By 1860, he expanded the business and began importing ice on a large scale from Norway. In New Zealand, a newspaper advertisement for ice cream appeared in 1866, claiming to be the first time ice cream was available in Wellington. Commercial manufacturing was underway in 1875. Ice cream rapidly gained in popularity in New Zealand throughout the 20th century. By 2018, exported ice cream products included new flavours such as matcha to cater to Asian markets. Agnes Marshall, regarded as the "queen of ices" in England, did much to popularize ice cream recipes and make its consumption into a fashionable middle-class pursuit. She wrote four books: The Book of Ices (1885), ''Mrs. A.B. Marshall's Book of Cookery (1888), Mrs. A.B. Marshall's Larger Cookery Book of Extra Recipes (1891) and Fancy Ices'' (1894) and gave public lectures on cooking. She even suggested using liquid nitrogen to make ice cream. Ice cream soda was invented in the 1870s, adding to ice cream's popularity. The invention of this cold treat is attributed to American Robert Green in 1874, although there is no conclusive evidence to prove his claim. The ice cream sundae originated in the late 19th century. Some sources say that the sundae was invented to circumvent blue laws, which forbade serving sodas on Sunday. Towns claiming to be the birthplace of the sundae include Buffalo, Two Rivers, Ithaca, and Evanston. Both the ice cream cone and banana split became popular in the early 20th century. The first mention of the cone being used as an edible receptacle for the ice cream is in ''Mrs. A.B. Marshall's Book of Cookery'' of 1888. Her recipe for "Cornet with Cream" said that "the cornets were made with almonds and baked in the oven, not pressed between irons". The ice cream cone was popularized in the US at the 1904 World's Fair in St. Louis, Missouri. to which some people have an intolerance. Recent awareness of this issue has prompted a number of manufacturers to start producing gluten-free ice cream. The 1980s saw thicker ice creams being sold as "premium" and "super-premium" varieties under brands such as Ben & Jerry's, Chocolate Shoppe Ice Cream Company and Häagen-Dazs. == Composition ==
Composition
Ice cream is a colloidal emulsion made with water, ice, milk fat, milk protein, sugar and air. Water and fat have the highest proportions by weight creating an emulsion that has a dispersed phase as fat globules. The emulsion is turned into foam by incorporating air cells which are frozen to form dispersed ice cells. The triacylglycerols in fat are nonpolar and will adhere to themselves by Van der Waals interactions. Water is polar, thus emulsifiers are needed for dispersion of fat. Also, ice cream has a colloidal phase of foam which helps in its light texture. Milk proteins such as casein and whey protein present in ice cream are amphiphilic, can adsorb water and form micelles which will contribute to its consistency. The proteins contribute to the emulsification, aeration and texture. Sucrose, which is a disaccharide, is usually used as a sweetening agent. Lactose, which is sugar present in milk, will cause freezing point depression. Thus, on freezing some water will remain unfrozen and will not give a hard texture. Too much lactose will result in a non-ideal texture because of either excessive freezing point depression or lactose crystallization. == Retail sales ==
Retail sales
Ice cream can be mass-produced and thus is widely available in developed parts of the world. Ice cream can be purchased in large cartons (vats and squrounds) from supermarkets and grocery stores, in smaller quantities from ice cream shops, convenience stores, and milk bars, and in individual servings from small carts or vans at public events. In 2015, the US produced nearly of ice cream. vendor delivery == Ingredients and legal definitions ==
Ingredients and legal definitions
soft ice cream, Japan Many countries have regulations controlling what can be described as ice cream. In the United Kingdom, Food Labelling Regulations (1996) set a requirement of at least 5% milk fat and 2.5% milk protein in order to be sold as ice cream within the UK. In rest of the European Union, a trade organization called European Ice Cream Association calls for minimum dairy fat content of 5%. In 2015, these regulations were relaxed so that containing milk fat or protein was no longer necessary in the UK for a product to be sold as "ice cream", though at least 5% milk fat is still required for a product to be labeled "dairy ice cream". After this change, many UK products labelled as "ice cream" substitute milk fat with cheaper alternatives like palm oil, coconut oil, and vegetable fats. In the US, the FDA rules state that to be described as "ice cream", a product must have the following composition: • greater than 10% milk fat • 6 to 10% milk and non-fat milk solids: this component, also known as the milk solids-not-fat or serum solids, contains the proteins (caseins and whey proteins) and carbohydrates (lactose) found in milk It generally also has: • 12 to 16% sweeteners: usually a combination of sucrose and glucose-based corn syrup sweeteners • 0.2 to 0.5% stabilizers and emulsifiers • 55 to 64% water, which comes from the milk or other ingredients These compositions are percentage by weight. Since ice cream can contain as much as half air by volume, these numbers may be reduced by as much as half if cited by volume. In terms of dietary considerations, the percentages by weight are more relevant. Even low-fat products have high caloric content: Ben and Jerry's No-Fat Vanilla Fudge, for instance, contains per half-cup due to its high sugar content. According to the Canadian Food and Drugs Act and Regulations, ice cream in Canada is divided into "ice cream mix" and "ice cream". Each has a different set of regulations. • "Ice cream" must be at least 10 percent milk fat, and must contain at least of solids per litre. When cocoa, chocolate syrup, fruit, nuts, or confections are added, the percentage of milk fat can be 8 percent. • "Ice cream mix" is defined as the pasteurized mix of cream, milk and other milk products that are not yet frozen. It may contain eggs, artificial or non-artificial flavours, cocoa or chocolate syrup, a food colour, an agent that adjusts the pH level in the mix, salt, a stabilizing agent that does not exceed 0.5% of the ice cream mix, a sequestering agent which preserves the food colour, edible casein that does not exceed 1% of the mix, propylene glycol mono fatty acids in an amount that will not exceed 0.35% of the ice cream mix, and sorbitan tristearate in an amount that will not exceed 0.035% of the mix. Ice cream mix may not include less than 36% solid components. == Physical properties ==
Physical properties
Ice cream is considered a colloidal system. It is composed by ice cream crystals and aggregates, air that does not mix with the ice cream by forming small bubbles in the bulk and partially coalesced fat globules. This dispersed phase made from all the small particles is surrounded by an unfrozen continuous phase composed by sugars, proteins, salts, polysaccharides and water. Their interactions determine the properties of ice cream, whether soft and whippy or hard. Ostwald ripening ice cream bar Ostwald ripening is the explanation for the growth of large crystals at the expense of small ones in the dispersion phase. This process is also called migratory recrystallization. It involves the formation of sharp crystals. Theories about Ostwald recrystallization admit that after a period of time, the recrystallization process can be described by the following equation: r = r (0) + Rt \exp(1/n) Where r (0) is the initial size, n the order of recrystallization, and t a time constant for recrystallization that depends on the rate R (in units of size/time). To make ice cream smooth, recrystallization must occur as slowly as possible, because small crystals create smoothness, meaning that r must decrease. == Around the world ==
Around the world
Around the world, different cultures have developed unique versions of ice cream, suiting the product to local tastes and preferences. Overview in Rome, Italy Italian ice cream, also known as gelato, is a traditional and popular dessert in Italy. Much of the production is still hand-made and flavoured by each individual shop in gelaterie a produzione propria. Gelato is made from whole milk, sugar, sometimes eggs, and natural flavourings. It typically contains 4–9% fat, less than ice cream's minimum of 10%. Per capita, Australians and New Zealanders are among the leading ice cream consumers in the world, eating and each per year respectively, behind the United States where people eat each per year. Ice Golas are a summer treat consisting of shaved ice packed into a popsicle form on a stick and soaked in flavoured sugar syrup, a popular choice being kala khatta in India, made from the sweet and sour jamun fruit. In Puerto Rico a popular dessert is the Piragua, shaved ice put into a cone shaped cup, with different syrup flavors poured on top of the ice. Vendors walk on sidewalks and near the beach with a small cart containing a huge block of ice and 10 to 15 bottles containing fruit syrups such as Tamarindo and Parcha. In Spain, ice cream is often in the style of Italian gelato. Spanish can be found in many cafés or speciality ice cream stores. While many traditional flavours are sold, cafés may also sell flavours like nata, viola, crema catalana, or tiramisu. In the 1980s, the Spanish industry was known for creating many creative and weird ice cream bars. In the United Kingdom, 14million adults buy ice cream as a treat, in a market worth £1.8billion (according to a report produced in 2024). In the United States, ice cream made with just cream, sugar, and a flavouring (usually fruit) is sometimes referred to as "Philadelphia style" ice cream. Ice cream that uses eggs to make a custard is sometimes called "French ice cream". American federal labelling standards require ice cream to contain a minimum of 10% milk fat. Americans consume about 23 litres of ice cream per person per year—the most in the world. According to the NPD Group, the most popular ice cream flavours in the U.S. are vanilla and chocolate with a combined market share of 40% as of 2008. == Cones ==
Cones
cone ''Mrs A. B. Marshall's Cookery Book'', published in 1888, endorsed serving ice cream in cones. Agnes Marshall was a celebrated cookery writer of her day and helped to popularize ice cream. She patented and manufactured an ice cream maker and was the first to suggest using liquefied gases to freeze ice cream after seeing a demonstration at the Royal Institution. Reliable evidence proves that ice cream cones were served in the 19th century, and their popularity increased greatly during the St. Louis World's Fair in 1904. According to legend, an ice cream vendor at the fair ran out of cardboard dishes. The vendor at the Syrian waffle booth next door, unsuccessful in the intense heat, offered to make cones by rolling up his waffles. The new product sold well and was widely copied by other vendors. == Cryogenics ==
Cryogenics
staff at the Goddard Space Flight Center making ice cream with liquid nitrogen In 2006, some commercial ice cream makers began to use liquid nitrogen in the primary freezing of ice cream, thus eliminating the need for a conventional ice cream freezer. The preparation results in a column of white condensed water vapour cloud. The ice cream, dangerous to eat while still "steaming" with liquid nitrogen, is allowed to rest until the liquid nitrogen is completely vaporized. Sometimes ice cream is frozen to the sides of the container, and must be allowed to thaw. Good results can also be achieved with the more readily available dry ice, and authors such as Heston Blumenthal have published recipes to produce ice cream and sorbet using a simple blender. == See also ==
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