My first go at baking for my boy's 1st birthday :) http://www.bbcgoodfood.com/recipes/5557/chocolate-marble-cake 2 x 25cm bundt cake rings + 1 x 15cm round cake, cut to size. I can give more detail, if wished. Took me 9 hours from scratch - a real labour of love - but I'm hoping I'll get quicker with future cakes!