Poundcake is any type of cake made with equal measures of its four main ingredients: traditionally a pound of flour, butter, eggs, and sugar. The exact quantity depends upon the size of the cake that is desired. Therefore any cake made with a 1:1:1:1 ratio of flour, butter, eggs, and sugar is also called a pound cake.
There are numerous variations on the traditional pound cake, with certain countries and regions having distinctive styles. These can include the addition of flavourings (such as vanilla extract or almond extract) or dried fruit (such as currants or raisins).
In the Southern States of America, poundcake would contain one pound each of flour, butter, eggs, and sugar. In typical volume measurements, this is approximately three cups of flour, two cups of butter, eight large eggs, and almost three cups of sugar. Poundcake is considered a staple in the cuisine of the Southern United States. Typically they are not decorated in any way.