Cut out few paper in size 16cm x 5.5cm and 6cm, line the paper in cake rings.
Melt butter and Guanaja in microwave.
Whip up egg and caster sugar.
Add melted chocolate/butter to egg/sugar mix.
Sift flour into mixture and fold till even, fold in ginger juice .
Fill cake mixture into piping bag and keep in fridge for at least 12 hours.
Pipe 60g cake mix into cake ring lined with baking paper. Bake in a 190c preheated oven for 6 – 8 mins.
Remove the ring and baking paper, serve immediately.