Note from Ricardo
The meringue discs and cake can be made a day in advance, wrapped and kept at room temperature. However, the Italian meringue must be made just before assembling; otherwise it will set and no longer be spreadable.
With two layers of chocolate cake, crispy meringue on the inside and a softer, marshmallowy version as the icing, this double dose of meringue was a match made in heaven. Pro tip: The icing needs to be made at the very last minute, as it’s more malleable (read: easier to work with) when freshly whipped.