How to cook
The avocados need to be soft and well-ripened. Cut them in half, remove the pit and scoop out the fruit from the rind using a spoon. If they're really well-ripened, you can just peel them.
Mash the avocado pieces with a hand blender, add the coconut butter (if it's hard, melt it in the microwave or in a water bath), peeled and chopped into slices banana, the cocoa, vanilla and stevia to taste, depending on how sweet you want it.
Mash to a smooth mixture.