What makes this bread "dark" is the molasses that's used as the predominant sweetener as well as the cocoa powder, both of which make the bread deeply flavorful, too. Cumin seeds impart subtle spice, while wheat germ ups the nutritional value. What's more, the shaped dough is brushed with water and then sprinkled with rye flour before baking. Slashing the top with a knife helps encourage rising in the oven.