Flourless and Butterless Hazelnut and Chocolate Cake

Hazelnut and chocolate are a perfect match and one of my favourite flavour combinations. I created this cake many years ago, as I wanted to use nuts other than the classic almonds for Passover, and wanted to keep it dairy-free. In this cake, the flavours shine and the ingredients list keeps things simple. There is no flour, no butter - or any fat, in fact - and only egg whites are used, not yolks. The result is moist and utterly delicious. It’s suitable for Passover,