Other grain whiskeys are blended from a number of grains, such as rye, corn, wheat and malted barley. These are produced in numerous countries, from Ireland to artisan distillers in the USA. These whiskeys are usually aged for several years (five to eight or longer) in oak barrels and have flavor profiles that vary according to the blend of grains; notes of cinnamon, olive, walnut, leather and praline are common. These are often limited production whiskeys and are meant for sipping in a small snifter.