The frosting for a Nutella cake is often a velvety chocolate-hazelnut buttercream or a Nutella ganache. The buttercream is made by combining Nutella with butter, powdered sugar, and sometimes a splash of vanilla extract. It is then spread or piped onto the cake layers, creating a smooth and decadent finish. A Nutella ganache is made by gently melting Nutella with heavy cream, resulting in a shiny and glossy topping that enhances the cake's flavor and appearance.
