A posh hot chocolate used to just mean adding marshmallows and whipped cream, but these days it is all about the cocoa percentage as retailers selling luxury single-origin drinks set out to conquer the high street.
The fast-growing brand Knoops sells more than 20 different types of hot chocolate in its shops ranked by strength, from a sweet and creamy 28% white all the way up to an intense 100% extra dark.
