I need to bake a cake that will be eaten as pudding for my FIL's 65th birthday party. Everyone there is an ultra-foody and I have the baking side to keep up! It doesn't have to be a classic cake: I had considered doing Nigel Slater's lemon ice cream cake in the gingery crust, but think it might melt in my dash across London. I have to be able to bake it in one day as I'll be working Mon-Wed so won't be domestically inclined until the day itself.
Any flashes of genius out there?