Place nuts* and salt into a food processor or high power blender. Process peanuts anywhere from 5 to 15 minutes, until they turn into nut butter** (when the mixture starts having a smooth and shiny surface). The processing time will vary depending on the kind of the appliance used.
Transfer your peanut butter in an airtight container and store it in the fridge for several weeks. In my home, it survives no longer than a week :)
Notes
*If using raw nuts. Preheat an oven to 360F (180C). Distribute your nuts evenly on a baking sheet, place it in the oven. Roast them, while stirring occasionally, for 7 to 15 minutes. The roasting time depends on the oven and the desired intensity of the roast.After your peanuts are roasted, let them cool. Remove skins by rubbing the nuts with your hands. Then step outside and blow skins away.**Do not add any water during the blending process. As nuts are mostly oil, and oil and water do not mix, it will make your butter less smooth. The heat from the blender (or food processor) will soften nuts, helping them melt.