In a small saucepan on low heat, melt chocolate, stirring every 30 seconds.
Add avocado, chocolate, collagen, vanilla, syrup, almond meal and 2 tbsp cacao to food processor and blitz until smooth. Transfer to a bowl, cover with cling wrap and place in fridge for 20 minutes.
Remove from fridge and using a spoon, scoop out mixture and roll into 8 even balls. Dust with remaining cacao powder. Keep in an airtight container in the fridge for up to 5 days.