This cake is very tall... for a smaller version, simply halve the recipe.
It'll make a delicious two-layer cake.
This cake will last for 3 days+ at room temperature.
You can use milk/dark chocolate in the buttercream instead, but I definitely recommend the Kinder Chocolate to fit with the theme.
Recipe update June 2022 - only difference is using a different drip method (150g dark chocolate + 1-2tsps oil before), and changing the flavouring to vanilla from This sweet hazelnut & chocolate flavouring!