Stalls include William Curley, who has been awarded Best British Chocolatier for the third year in succession by The Academy of Chocolate, and Choc Chick selling kits to make raw chocolate at home.
COCOAPOD from Petts Wood will be selling their colourful handmade chocolates.
There's also a programme of talks and demonstrations.
For the latest local news and events direct to your inbox every Monday, you need our weekly email newsletter SE1 Direct.
7,000+ locals read it every week. Can you afford to miss out?
Read the latest issue before signing up