First (#18) Marzipan; sieve 8 ounces of icing sugar into a large bowl containing a pound of ground almonds. In a small bowl, beat an egg with 3 or 4 tablespoons of lemon juice. Use a wooden spoon or the beater attachment on a food mixer to form a paste. Use a knife to cut off the top of the Christmas Cake so that it is nice and flat on top. Knead the marzipan a little while and then roll two thirds out using icing sugar instead of flour to form a top circle, gluing it in place with some warmed apricot jam. The Grigson gave a handy hint at this point – roll everything out on a bit of greaseproof paper to prevent it sticking and falling to bits. She is a star! Now roll out an oblong of marzipan to wrap around the cake, again sticking it with apricot jam.
FYI: Marzipan originated in Persia (now Iran/Iraq), but its name originates from the German for 'March bread'.
(#19) Royal Icing was quite exciting to do; whip two egg whites until foam