This gluten-free hazelnut cake is perfect for those who have a gluten intolerance or allergy. The cake is made with hazelnut flour, sugar, eggs, 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. This cake is perfect for any occasion and can be served with whipped cream or fruit.