If you're a fan of chocolate and hazelnuts, this cake is for you. This recipe combines the rich flavor of chocolate with the nutty taste of hazelnuts to create a decadent dessert that is sure to satisfy your sweet tooth. To make this cake, you will need hazelnut flour, cocoa powder, eggs, sugar, butter, and baking powder. Mix all the ingredients together, pour the batter into a cake pan, and bake for 30-35 minutes. Once the cake is cooled, you can top it with chocolate ganache or whipped cream for an extra indulgent treat.