Firstly melt the 100g of chocolate in a heatproof bowl over hot water. Stir frequently until chocolate has melted. Transfer this chocolate into a smaller bowl and dip the rim of your glasses in it to coat - don't worry if it goes down the side of the glass - it adds to the effect of the drink. Then dip the glass into the crushed nuts. You can also drizzle some of the melted chocolate on the inside of the glass. At this stage I also put the halved bananas on a skewer cover them with some chocolate and nuts and keep this in the freezer to set a bit. Put the glasses in the freezer while you make the shake.

Add all the ingredients for the shake in a high powered blender and blend until smooth.

Put the marshmallows on a skewer and toast them if you haven't already. We use a mini blow torch to do this.

Pour the shake ingredients into the glasses - leave about an inch from the top so you can add a scoop of icecream to each one, then top with soy whip, add your decorations (toasted marshmallows and choc bananas), drizzle some melted chocolate on top, if there is any left, and topped with some crushed nuts. Enjoy!