Peanuts are native to the tropics of the Americas and were mashed to become a pasty substance by the Aztec Native Americans hundreds of years ago. A number of peanut paste products have been used over the centuries, and the distinction between peanut paste and peanut butter is not always clearcut in ordinary use. Early "models" of peanut butter, like the Aztecs' version, were nothing but pure roasted peanut paste. It was harder to work with and spread than regular peanut butter and had more of an unadulterated, yet somewhat more bitter taste. Vegetable oil was also later added to most brands to aid in its spreadability, but with new modern processing machines being invented, the peanut butter was already significantly smoother than it had been.Evidence of peanut butter as it is known today comes from U.S. Patent 306,727, issued in 1884 to Marcellus Gilmore Edson of Montreal, Quebec, Canada, for the finished product of the process of milling roasted peanuts between heated surfaces until the peanuts entered "a fluid or semi-fluid state." As the peanut product cooled, it set into what Edson explained as being "a consistency like that of butter, lard, or ointment." Edson's patent is based on the preparation of a peanut paste as an intermediate to the production of peanut candies. While Edson's patent does not describe the modern confection we know as peanut butter, it does show the initial steps necessary for the production of peanut butter.J.H. Kellogg, of breakfast cereal fame, (and his brother, W.K. Kellogg) invented their own early version of peanut butter in 1895 and in 1897, J.H. Kellogg secured U.S. Patent 580,787 for his "Process of Preparing Nutmeal," which produced a "pasty adhesive substance" that Kellogg called "nut-butter."Dr. Ambrose Straub, a physician in St. Louis, Missouri, pursued a method for providing toothless elderly with protein in the 1890s. His peanut-butter-making machine was patented in 1903.January 24 is National Peanut Butter Day in the United States.
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