Coarsely chop 180g dark chocolate and place in a microwave-safe bowl. Microwave on High (100%) in 20-second bursts, stirring with a metal spoon between each burst, until chocolate is smooth and melted (see note). Set aside to cool slightly. Finely grated remaining chocolate and set aside

Cut avocados in half and scoop flesh into a blender. Reserve avocado shells. Add melted chocolate, cream, maple syrup and vanilla to blender and process mixture until smooth

Spoon mixture into reserved avocado shells. Sprinkle with grated chocolate and edible flowers to serve