This hazelnut praline cake is a showstopper dessert that is perfect for special occasions. The cake is made with ground hazelnuts, flour, sugar, eggs, and butter. The praline filling is made with caramelized hazelnuts and cream. The cake is then topped with a chocolate ganache and more caramelized hazelnuts. The cake is moist, nutty, and has a crunchy texture from the praline filling.