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Peanut butter is a food product usually consisting of roasted and ground peanuts, sometimes sweetened. It is commonly sold in grocery stores, but can be made at home. Many styles are available; the most popular are creamy (smooth) and crunchy, but honey-roasted, wholenut varieties and those mixed with chocolate can also be found. Creamy peanut butter is made by grinding all of the mixture very finely. The crunchier styles add larger pieces of peanut back into the creamy mixture after grinding.

Used in sandwiches (particularly the classic peanut butter and jelly sandwich), candy (for example Reese's Pieces), cookies and pastry, it is a good source of protein, and is popular with children. For people with nut allergies, the intense concentration of nuts in peanut butter can cause fatal anaphylactic shock. The peanut plant is susceptible to the ground mold which produces aflatoxin, and contamination in peanut butter is possible.

History

In 1890, George A. Bayle Jr., began to sell ground peanut paste as a protein substitute for people with no or bad teeth. In 1893, Dr. John Harvey Kellogg originated an early variety of peanut butter at the Battle Creek Sanitarium in Battle Creek, Michigan. Kellogg, along with his brother, W.K. Kellogg, patented a process for making peanut butter in 1895, but it used steamed peanuts rather than roasted peanuts.

Contrary to popular belief, the renowned botanist, George Washington Carver had no hand in inventing this food in addition to the numerous uses for the legume he developed. Peanut butter was widely introduced in 1904 by C.H. Sumner at the Louisiana Purchase Exposition (Saint Louis World's Fair) which also popularized the ice cream cone, hot dog and hamburger.

In 1922, Joseph L. Rosefield developed modern peanut butter by using finer grinding, hydrogenation and a way to keep the oil from separating. This created a creamy texture unlike the earlier peanut butter described as gritty, or pasty. He received a patent for stable peanut butter which had a shelf-life of up to a year.

Swift & Company adopted the technology for their E.K Pond peanut butter which they had introduced somewhat earlier in 1920. In 1928 they changed the name to "Peter Pan". Peter Pan was originally packaged in a tin can similiar with a turn key and re-closable lid but switched to glass during World War II. In 1932, Rosefield left and formed his own company selling "Skippy" peanut butter.

Peanut butter became a very profitable business in the United States. Currently, the best-selling American brand is Jif, a Procter & Gamble product first sold in 1958. The oldest surviving brand is Krema peanut butter, first sold in 1908.

Trivia

Peanut butter also makes a superior mouse trap bait to cheese. Not only do mice prefer it to cheese, but its sticky texture reduces the mouse's ability to steal the bait and not get caught. And to people who like animals, peanut butter is also a food ingredient for squirrels.

In 2002, an intentionally irreverent pseudo-scientific paper was published establishing that "Peanut Butter has no effect on the rotation of the Earth". (See also Ig Nobel Prize)

The mother of all peanut butters

As of September 2004, the most expensive peanut butter on market is a $501 limited item which you can mail-order from the National Institute of Standards and Technology of the U.S. This peanut butter (SRM 2387) is a set of three 170 g jars which will expire on December 31, 2009.

This piece of reference material has been analyzed with state-of-the-art measurement methods to provide values for the amount of fat, 18 individual amino acids (protein), vitamins, minerals, other nutrients and mold-produced carcinogenic aflatoxins. A food manufacturers can use it to validate production and quality control procedures as well as ensure accurate labeling of product content. It can also be used to evaluate allergen test kits.

See also

• Peanut
• George Washington Carver
• Peanut butter and jelly sandwich (PB&J)

External links

• History of Peanut Butter at PeanutButterLovers.com
• The NIST peanut butter order form