Dark roast coffee beans have been roasted longer than other types, resulting in a darker bean and a more full-bodied cup of joe. A longer roast moderates bright flavors and reduces caffeine levels, so dark roast coffee is less sour and more bitter than a light roast. Coffee isn't just about flavor and energy, though.

• With the right dark roast, beans can develop sweet and rich taste profiles. Dark roasts are often bold and rich, full of body and texture.
• Dark roasted beans are oilier, which sometimes leads to a bittersweet or toasty taste, as well as decadent chocolaty flavor.