Place roasted peanuts in a food processor and process until finely chopped. Add the rest of the ingredients and process until combined and sticky and mixture starts to stick together.
Roll mixture into 1-inch (2.5 cm) balls, and place them in an airtight container. Place in the fridge.
These balls keep well in the fridge. If you want to keep them for longer than 1-2 weeks, they also keep well in the freezer.