Mint chocolate cake

[MrsHoneyMummy]

Hi All,
Advice please:
I'm busy making a mint chocolate cake for my DD's birthday. One mint cake, one chocolate, one mint cream, one chocolate ganache.
DD's name to be "written" in (white) mint sweeties on the top.
Mint cake and mint butter cream are both green.
So would you sandwich with chocolate and cover in green, or sandwich with green and cover in chocolate?

Considerations: is a green cake more interesting than a brown one?
Is green better because no mint haters are going to get an unpleasant surprise as they might if they thought it was "just" a chocolate cake?
Will the white name stand out better against green or brown?

TIA for your opinions.

PS If you have an idiot proof recipe for chocolate ganache I'd welcome that, too.

What did you opt for in the end?

Hello,
I consulted the DC and they said maybe green on the outside would look a bit too "radioactive" so it was sandwiched with mint butter icing and covered in Jamie Oliver's chooclate coating (100g butter, 100g icing sugar, 100g good quality dark chocolate, 3 tbsp milk - all melted together over a bain marie and then poured over the cake).... and I decorated the adges with After Eights..... I think it was a success.... ther's not much of it left.

There's a difference in colour between the green cake and the green butter cream because the eggs were very yellow.
If I were entering the GBBO I would, of course, have made two thinner layers of each colour rather than doorsteps, but frankly I couldn't be **sed.