Purée the avocado until smooth.
Mix together the cocoa powder, collagen peptides and coconut milk until combined and add to the avocado.
Stir in the vanilla extract, and any extra ingredients and mix or blend well.
Transfer the mousse to individual bowls and store in the fridge until ready to eat.
Note: When you are not following a sugar detox, you may add 1 tsp. of green-leaf stevia, monk fruit or other low-carb natural sweetener.