I have has numerous versions of this pudding, most times it includes lots of sweetener and a liquid of some kind.
This is a more paleo version using avocado, unsweetened cocoa, banana, and a little honey or grade B maple syrup.
2 ripe avocados
3 tbsp cocoa
1 ripe banana
1-2 tbsp honey or maple syrup ( I recommend adding it if you need to after blending everything else together)
2 tbsp coconut milk (If its still a little thick add a couple tbsp of coconut milk)
In your blender or food processor blend together first 3 ingredients, try it, if it needs to be sweeter add some honey or maple syrup. Add a little coconut milk if its too thick.
You can chill for 30 mins in the fridge or eat immediately.
I like to garnish with a little coconut for extra crunch.