George Washington Carver did not invent peanut butter. The earliest reference to peanut butter dates back to the ancient Incas and Aztecs who ground roasted peanuts into a paste. However, modern peanut butter, its production process, and the equipment used to make it, can be credited to at least three inventors.
In 1884, Marcellus Gilmore Edson of Canada patented peanut paste, the finished product of grinding roasted peanuts between two heated surfaces. In 1895 Dr. John Harvey Kellogg (creator of Kellogg’s cereal) patented a process for creating peanut butter from raw peanuts. He marketed it as a nutritious protein substitute for people who could barely chew solid food. In 1903, Dr. Ambrose Straub of St. Louis, Missouri, patented a machine for making peanut butter.
George Washington Carver stole credit for the invention.