You can make as little or as much peanut butter as you like! I normally just whizz up 165g (6 oz), which gives me a little over ½ cup of peanut butter.
Method
Put your peanuts in a food processor and turn it on.
It will go through a few stages, from a crumble, to a ball, until it finally turns into a smooth paste. The whole process will take about 5 minutes.
Enjoy!
Recipe by Butter Baking at https://www.butterbaking.com/2012/10/31/homemade-peanut-butter/