Blend until smooth. Add a little more milk if needed to make a smoother consistency.
Divide into serving glasses and chill for 3 hours then top with chopped pistachios (optional).
You need to make sure you are using a ripe avocado. A hard avocado won't blend well and you won't get that creamy texture.
This recipe will vary depending on the size of the avocado that you use and how ripe the avocado is. The riper the avocado, the more flavour it will have. So taste it as you go and adjust the flavours to suit your own tastes.
To make this avocado chocolate pudding super creamy, use a high powdered blender.
You could sweeten this with dates instead of maple syrup. Simple blend 2 dates with a little bit of water to make the same amount of liquid as the maple syrup.
A tiny pinch of sea salt really brings out all the flavours of this avocado chocolate mousse.