This hazelnut brown butter cake is a unique and flavorful dessert that is sure to impress. The cake is made with brown butter, which gives it a rich and nutty flavor. The layers are filled with a light and creamy hazelnut frosting, which adds a touch of sweetness and complements the nutty flavor of the cake. This recipe requires a bit more effort than some of the others on this list, but the end result is well worth it.