What Are Some Coffees From Starbucks That Contain Low Amounts of Acid?

The Sumatra is a dark coffee with a bold taste. It features dried herbs, giving the coffee an earthy flavor. To brew the coffee, Starbucks recommends using fresh cold water and a clean machine. For a coffee press machine, use coarse grinds, and for an automatic drip machine, use medium grinds. For 2 tablespoons of coffee, use 6 ounces of water. Starbucks states that it ethically sources its coffee to provide a better economic environment for farmers.