Black and white peppercorns are available whole, cracked, and coarsely or finely ground. Whole peppercorns freshly ground with a pepper mill deliver more flavor than pre-ground pepper. White pepper is commonly used for its appearance, usually in light-colored sauces or foods such as mashed potatoes, where dark specks of black pepper would stand out. Whole, dried peppercorns can be stored in a cool, dark place for up to a year and ground pepper usually keeps for about four months. Green peppercorns packed in brine are available in jars and cans. They should be refrigerated once opened and can be stored for one month. Freeze-dried green peppercorns are also available and can be stored in a cool, dry place for up to six months.