Hi Sarah.
It’s always such a responsibility to take on someone’s special cake and it’s lovely that your cousin has faith in you to produce theirs.
It would be great to see a photo of the style of cake so we could maybe be more specific with the advice.
All I would say is plan your time very carefully. Don’t rush and don’t panic. You’ve got this!
You can cover a cake and stack cakes. You could always make up a batch of royal icing and practice at getting the right consistency, tip to use and pattern work.
Personally with royal icing details on the tiers I would even start baking on the Monday and chill in the fridge. Stack and cover with ganache on the Tuesday and chill again. Wednesday I would cover the cakes with fondant and make sure I do my best to cover them perfectly. You could also use the Wednesday to start decorating the tiers if you want to. With the fondant soft you could maybe emboss the pattern onto the tiers to help you or wait until the fondant has dried and start on the Thursday.
At this point, if something has gone wrong or you’re not happy with anything, you still have plenty of time to correct it. If everything is going well then great! Take a breather and really concentrate on that icing work.
If the cake requires stacking before decorating then you can do this on the Thursday. Then you have the Thursday and Friday to complete the decorations and have enough time for everything to dry and set into place.
Good luck and I’m sure that it’s going to be lovely 😊
Daisychain's cakes