Early chocolate was produced sweetened cakes and sold as a spice. Until the later half of the 19th century, it was primary served as what we know of as hot chocolate. My block of American Heritage chocolate is about 5 oz of pressed cocoa, delicately spiced with anise, red pepper, nutmeg, orange and cinnamon.

(via Four Pounds Flour: Retronovated Recipes: Chocolet Puffs)