ice cream
It is a kind of volume-expanded frozen food made of drinking water, milk, milk powder, cream (or vegetable oil) and sugar as main raw materials, and a proper amount of food additives through mixing, sterilization, homogenization, aging, freezing and hardening. About 1700, ice cream was introduced to the American continent, and George Washington, the first president of the United States, was crazy about this new technology. At that time, making ice cream was not easy. In order to eat this kind of food in summer, people have to take ice cubes out of the river in winter and store them in sawdust. Ice cream is still the food of the rich. From 65438 to 0846, an American woman named Nancy Johnson improved the complicated technology and made a manual crank freezer, which made the ice cream making process easier. 185 1 year, American Zakabu Fissel opened the first American ice cream factory in Baltimore, Maryland, USA. From 65438 to 0900, due to the wide application of electric power and thermodynamics theory, the process of making ice cream was accelerated, and the cost was reduced, thus the price was greatly reduced. Since then, ice cream has become a popular summer food. As refrigerators and freezers are becoming more and more popular in China, every hot summer, ice cream is sold in large and small shops in cities and villages, and many families are used to making ice cream suitable for their own tastes. Even in the cold winter, many people like to eat ice cream.