Make your own peanut butter with this method of simply blending peanuts in your food processor.
Dry Roasted Peanuts(I used 2.5 cups)
Place the dry roasted peanuts in the bowl of the food processor.
Process the peanuts for about 2 to 3 minutes. (You will probably be able to use a lower speed on your food processor.)
The mixture will go through several stages as you process the peanuts, starting out looking like crumbs, then beginning to stick together and forming a lump, then beginning to get creamier but still somewhat grainy.
At about 2 minutes and 30 seconds of processing, the mixture should lose its graininess and be a smoother mixture, and the process will then be complete.
I store my peanut butter in the refrigerator as the mixture does not have any preservatives.