Place all the peanuts in your food processor and blend for 8-10 minutes. Every 2-3 minutes you may need to stop the processor and use a spoon to break up the peanuts/scrap down the sides of the bowl. At first the mixture will get crumbly/powder-y… just keep on processing because it will turn creamy! Depending on the freshness of your peanuts you may need to add a teaspoon or two of oil (canola, vegetable or peanut oil work well) but it usually is not necessary. Once your peanut butter is creamy, taste it and add a bit of salt if you like.