Battenburg Cake!

I had a look in the Co-operative Food magazine and spotted the recipe for a Battenburg Cake. Since my Fiancé loves Marzipan I thought I'd have a go at making one.  So, here is my attempt!

I used red food colouring to make pink which the batter was before baking, but it then turned a grey colour :(
A little disappointed with the presentation because of the dodgy colour but it tastes great!