Warm jam (add a teaspoon of water if required) and brush over sides and top of cake. Unroll marzipan and lay it over cake. Smooth marzipan over and down the sides with your hands, working from top centre. Trim off excess from bottom and fill any gaps. Let it set overnight.
Unroll the icing and again lay it over the cake like a blanket and smooth with your hands from top centre. Pipe a pattern on top with coloured or white icing. Brush with a little silver food colouring to lift the pattern, tie with a ribbon and store in an airtight container.