Biscuit pieces mixed into melted, gooey, chocolatey stuff and topped with plenty of good quality, chocolate. It has to be dark and 70% cocoa solids.
You will also need -
A baking tin sized around 20 x 34cm and about 3cm deep - lined with baking parchment
Keywords: chocolate, treat, indulgent, celebration, tiffin, fridge,
Find it online: https://marmaladeandme.com/chocolate-tiffin/