Chocolate sponge with butter cream and milk chocolate ganache. The wheels were RKT ganached and the covered in fondant. Everything was edible. The only thing was that I had to use a ready made fondant icing in BOTTLE GREEN. as this was the colour he wanted (Dads car colour) but i received a phone call a day after the party, The kids were all doiong GREEN poo's, So do be aware that this colour is very strong. Everyone had a good giggle tho.