This hazelnut and caramel cake is a decadent dessert that will satisfy any sweet tooth. The cake is made with hazelnut flour, sugar, eggs, and butter. The caramel sauce is made with sugar, cream, and butter. To make the cake, you need to mix the dry ingredients in one bowl and the wet ingredients in another bowl. Then, you combine the two mixtures and bake the cake in the oven for about 30 minutes. Once the cake is cooled, you can drizzle the caramel sauce over it. This cake is perfect for special occasions such as Valentine's Day or anniversaries.