Marina Malvada makes chocolate skulls using a mould cast from actual human skulls. She uses bone chocolate,her signature blend of Belgian white and milk chocolates, to get that just-pulled-from-the-crypt look. The process takes about three weeks from start to finish. Malvada, owner of chocolateskulls.com, bakes these wonderful 1:1 scale replica skulls that you can custom order from your own x-rays. They are available in a creamy mix of Belgian white and milk chocolate, termed Bone Chocolate, decadent Dark Chocolate, and Semisweet Chocolate.