Green & Black's Organic Advent Calendar. Green & Black’s milk and dark chocolate Advent Calendar is an elegantly presented, a collection of Dark 70%,Milk with Butterscotch, Dark with Ginger, Milk, Dark 80% miniature bars. Open a door each day to find the tempting treats that have been expertly crafted to make the perfect present for chocolate connoisseurs. Green & Black's individually wrapped dark and milk chocolates. Green & Black's create delicious chocolate made from the finest ethically sourced ingredients.