This is a soft chocolate hazelnut flavour sponge, not as light as the original which required all of the air to be incorporated in whisking the eggs with very little flour, but lighter than the which was very rich! Instead, this recipe sits somewhere nicely in the middle. A sponge that it packed with hazelnuts an chocolatey flavour, delicious to eat and would stand up to being covered in sugarpaste if needed.. This cake is also filled with a Nutella ganache made simply with Nutella and cream, and then decorated with lots and lots of Kinder Bueno bars, both in chocolate and white, finished with sprinkled chopped hazelnuts, Kinder bars and a Kinder Bueno pieces for good measure!. Unwrap the Kinder bars and put them in the fridge along with the bags of chocolates Preheat the oven to 275° F / 140° C / 120° Fan / Gas 1. Line an 8" tin & a 6" tin..