Dark Roast, fuller-bodied and bold, these coffees feature robust flavours and the characteristic essence of an intense roast. The Starbucks Single-Origin Sumatra. Like the lush Indonesian island of its origin, this spicy coffee stands alone. Each coffee requires a slightly different roast to reach its peak of aroma, acidity, body and flavour. Classified in three roast profiles, it is easy to find your favourite roast.