Melt chocolate in a microwave or using a double boiler. Put the peeled avocado in a bowl and add all the wet ingredients. Smash the avocado with a fork and mix the ingredients well. Alternatively, if a food processor is available, use it for a smoother result.
Prepare a separate bowl for the dry ingredients. Whisk them together then add to the avocado mixture. Stir until everything is combined.
Pour the batter into a baking dish greased with coconut oil. Even out the surface with a flat spatula and bake for 35 minutes.
Remove from the oven and leave to cool before slicing into 12 pieces. Serve in a plate with 2 slices of fresh avocado (optional) and enjoy.