I dreamed this cake up one day while driving. I had Cristina Tosi's approach to cake on my mind (Sarah was trying out her classic birthday cake -- I hope she'll share her thoughts soon!). What\ piqued my interest was the textural contrast Tosi goes for with the cake crumbs. It sounded really, really tasty. I began thinking where you could go with that. "Oooh! Shortbread crumbs!" It didn't take long for a giant twix cake to sound tremendously delicious.