Process all dry ingredients in a food processor
, then add the dates and vanilla extract and process until the dough sticks together when you press it between your fingers. It might take some minutes until the dough comes together. If it's still too dry after a while then add a few dates in addition or a little bit of maple syrup or raw agave syrup. The dates should be very soft and juicy. If they are rather dry you should soak them in water until they are soft.