Many of the cake's components can be made a head, and once the tiers are filled and decorated, they can be refrigerated up to two days or frozen up to two weeks before the wedding.
The rich, lemony cake has a dense texture like that of a pound cake.
To prevent discoloration of the filling, use a saucepan with a nonreactive interior, such as enamel or stainless steel. (The lemon juice acid will adversely affect the filling if it's made in an unlined iron or aluminum saucepan.)