There are three whole lemons used in Mary Berry's lemon cake, lemon drizzle icing and candied peel decorations so the flavour is incredibly intense and delicious. Equipment and preparation ...

Royal icing for cookie decorating ... of vanilla extract or lemon juice. Royal decorator icing is not meant to be eaten on its own, but rather used to decorate cookies, cakes, and other pastries.

Watch the technique videos for more information and see the recipe tips (below) for how to create the simple Christmas decorations ... the lemon juice. Spread the icing all over the cake.