Put the nuts into the food processor. Start blitzing on medium speed until you get a crumb-like mixture.
Slowly add the oil to the nut mixture and keep processing.
When the mixture starts to ball up, add the maple syrup and blitz a little more.
Drizzle the milk into the mixture and keep processing. The mixture should look lighter and smoother. Blitz until quite smooth (a couple of minutes).
If using, add vanilla and/or cinnamon.
The mixture will be a little warm from the processor but you should be able to eat it straight away, if you like.
Otherwise, place the mixture into a jar with a lid and store in the fridge for up to two weeks (if it lasts that long!).