What cake for a very hot picnic

[WonderingAboutCake]

My mum has a big birthday at the weekend, we’re going for a picnic and i’m meant to be making a cake.
Was planning on making Victoria sandwich and decorating with lots of fruit but it’s going to be 29 degrees and I don’t think it will survive.
Have been thinking along the lines of a lime loaf cake but it doesn’t feel that special.
Can anyone suggest a special cake that will survive a hot car journey and picnic?

Gooey chocolate fudge cake with thick chocolate ganache topping.. If it melts, all the better. Take spoons. Yum.

A squidgy lovely lemon drizzle cake

I know it's done a lot, but lemon drizzle? I don't want anything too heavy in this heat, no chocolate for sure.

What about a simple fresh fruit flan rather than a cake? Could still put a candle in it.

Definitely lemon drizzle.

Cherry cake made with plenty of ground almonds would probably cope well with the heat.