I only went and did it, I made some scrummy cakes!
I found the recipe online for these lemon and white chocolate cupcakes. The lemon part is the sponge and the white chocolate part is the icing. I slightly altered the recipe by adding more white chocolate in to the icing than what it said on the recipe, which I am glad I did. I think next time I might add some white chocolate chips into the batter too, for an extra creamy kick. Unfortunately I forgot we didn't have an icing bag so I had to spread with a spatula, they don't look too bad, in my opinion any way. If any one would like a link to the recipe then just let me know :)