(TrendHunter.com) Saffron is the rarest and most expensive food on earth, and Madhu Chocolate's Saffron Milk - 45% Cacao bar prominently features this prized spice. The luxe chocolate bar was inspired by... (TrendHunter.com) Saffron is the rarest and most expensive food on earth, and Madhu Chocolate's Saffron Milk - 45% Cacao bar prominently features this prized spice. The luxe chocolate bar was inspired by...