Peanut butter is a food paste made primarily from ground dry roasted peanut (actually a legume and not a nut) and is popular in North America, the Netherlands, the United Kingdom, Australia and parts of Asia, particularly the Philippines and Indonesia. It is mainly used as a sandwich spread, sometimes in combination with other spreads such as jam, chocolate (in various forms), vegetables or cheese. The United States is a leading exporter of peanut butter. Nuts are also prepared comparably as nut butters. Cultivated peanuts are native to the eastern foothills of the Bolivian Andes. The origin of peanut butter can be traced back to the Aztecs, who ground roasted peanuts into a paste. A number of peanut paste products have been used over the centuries and the distinction between peanut paste and peanut butter is not always clear in ordinary use. Modern processing machines allow for very smooth products to be made, which often include vegetable oils to aid in its spreadability. Canadian Ma...