Suet is the hard, concentrated, white fat that surrounds beef and sheep kidneys. It is now less often sold in solid form from butchers for grating at home - in supermarkets you will find suet sold already shredded and floured in a mix ready for use. A rich, pure fat that contains a high percentage of saturated fatty acids, beef suet is traditionally used for cooking many dishes including dumplings, fruit mince, suet crust pastry and steamed puddings.
Lamb suet is not widely available although butchers will be able to order it for you; it has a stronger flavor than beef suet and is therefore less adaptable in cooking and a poor choice for sweet dishes such as steamed puddings or pastry.
** Asian Recipes