1 Boiling causes bitterness, so never boil coffee. It should be brewed between 90 ‘C and 96 ‘C.
2. Do not reheat coffee. Make it fresh each time you serve it, and make only as much as you plan to drink. Coffee holds its flavor best at 80 ‘C
3. Use fresh water. Water is 98% of every cup; consider using a water filter or bottled water if your water tastes peculiar.
4. Do not reuse grounds. It’s unpleasant bitter components of the coffee.
5. Use the correct grind for your coffeemaker. Too fine the a grind will cause overextraction and bitterness, or clog your brewer. Too coarse a grind will cause watery coffee. For drip brewers, the appropriate grind should allow the coffee to finish dripping in several minutes.
6. For the best results, we recommend using 10g of ground coffee for each 180ml of water. Keep these proportions consistent. To dilute your coffee’s strength, simply add hot water brewing.
7. Coffee can be kept warm over a burner for only about 20 minutes before the flavor becomes unpleasant. An airpot or vacuum server will keep coffee hot and delicious for much longer periods of time.
from Starbucks
