When I made the royal icing recipe, it looked nice and glossy, spread on the cake very well. Left it to dry and then later when cutting the icing looked very dry underneath the top crust and fell off the marzipan.
I let the marzipan dry out for a few days before icing, and didn't cut the cake for 5 days - cake stored in cupboard uncovered to dry icing out for 24 hrs and then in a cake tin. Your help would be much appreciated before I do it again this year!!