This is a departure from normal royal traditions.
‘You'll have to wait and see on the day. It's an installation of the way that we're putting it out. It's the last thing that we'll reveal. It's a non-traditional layout,’ the baker said, according to the UK’s Telegraph.
On Wednesday, Claire – who is the owner of the London-based Violet bakery – posted a picture of the cake ingredients to Instagram.
‘And so it begins,’ she wrote alongside a photo of several crates of lemons.
Previously, it’s been revealed that Meghan and Harry were having a lemon and elderflower cake.
It will be decorated on the outside with white, elderflower swiss meringue buttercream and layered with lemon sponge.