Popcorn or popping corn is a type of corn which explodes from the kernel and puffs up when heated. Special varieties are grown to give improved popping yield. Some wild types will pop, but the cultivated strain is Zea mays averta, which is a special kind of flint corn. The process of making popcorn was first discovered by Native Americans thousands of years ago.Popcorn History

History

Popcorn was first discovered by the native Americans, who believed that the popping noise was that of an angry god who escaped the kernel.Fact: date=May 2008 Popcorn was very popular in the 1890s, until World War I. As corn crops became more depleted during this war, nuts were used instead of corn.Fact: date=March 2008 During the Depression, popcorn was a luxury at 5-10 cents a bag. When some of the other businesses failed, the popcorn business thrived. An example is "an Oklahoma banker who went broke when his bank failed, bought a popcorn machine, and started a business in a small store near a theater. After a couple of years, his popcorn business made enough money to buy back three of the farms he'd lost." During World War II, Americans ate three times more popcorn than they had before because of the sugar that was going overseas.

At least six localities (all in the United States of America) claim to be the "Popcorn Capital of the World": Valparaiso, Indiana; Van Buren, Indiana; Marion, Ohio; Ridgway, Illinois; Schaller, Iowa; and North Loup, Nebraska. According to the USDA, most of the maize used for popcorn production is specifically planted for this purpose; most is grown in Nebraska and Indiana, with increasing area in Texas.

As the result of an elementary school project, popcorn became the official state snack food of Illinois.

Some of the most popular brands of popcorn today are Orville Redenbacher's, Pop Secret, Act II, Jolly Time, and private label brands.

How popcorn pops

As the oil and the water are heated past the boiling point, they turn the moisture in the kernel into a superheated pressurized steam, contained within the moisture-proof hull. Under these conditions, the starch inside the kernel gelatinizes, softening and becoming pliable. The pressure continues to increase until the breaking point of the hull is reached: a pressure of about 135 psi (930 kPa) and a temperature of 180°C. The hull ruptures rapidly, causing a sudden drop in pressure inside the kernel and a corresponding rapid expansion of the steam, which expands the starch and proteins of the endosperm into airy foam. As the foam rapidly cools, the starch and protein polymers set into the familiar crispy puff.