Use a double boiler or a saucepan over low heat to melt the chocolate slowly. Make sure to stir regularly and take off the heat just before the chocolate is completely melted so it doesn't burn
Add the avocado, berries and vanilla to a food processor and process until smooth
Drizzle in the melted chocolate, a pinch of salt and the maple syrup and process until smooth
The mixture will be runny so place it into the freezer until workable - i.e. you can roll it into a ball without it losing its shape
While the chocolate is in the freezer make your raspberry dust. Place the freeze-dried raspberries in a blender and blend until it resembles a bright red dust (tip: don't open the blender and sniff the dust straight away as it will go all over your face and up your nose - although it does smell delicious)
Roll a heaped teaspoon of the chocolate mixutre into a ball and roll in the raspberry dust
Place in a dish lined with parchment paper and refrigerate until ready to serve
Although I used a mixture of berries for this batch - I have tried straight up strawberries and raspberries as well and they tasted fantastic.