Shortening is used as an ingredient in many baked goods to "shorten" the amount of flour required, which makes breads, pastries and other baked goods tender and flaky. When used in making cookies, if shortening is used instead of butter, the cookie will have a fluffier texture, but will not be a flavorful. Using butter increases the amount of water, since most shortening does not contain water, resulting in a thinner dough and thus a thinner cookie. Therefore, a common procedure is to use half butter and half shortening to provide both texture and taste to the cookie. If an alternative fat is desired, there are a variety of fats available that can be substituted for shortening. When storing, shortening can be kept in an airtight container at room temperature for approximately 12 months.