Layers of espresso-soaked chocolate sponge, salted caramel, shortbread biscuit crumbs and rich mascarpone cream create the most deliciously decadent Millionaire's Tiramisu. This is an eggless tiramisu recipe without shop-bought sponge fingers, so anyone following an egg-free diet can enjoy it. Add dark rum or whiskey to the espresso for a dessert that's a little more celebratory. Make this tiramisu a day ahead and allow to sit in the fridge overnight for the very best flavours and textures.