Wikipedia Article About Suet on Wikipedia Suet is raw beef or mutton fat, especially the hard fat found around the loins and kidneys. It is a solid at room temperature, and melts at about 21 °C (70 °F). It is a saturated fat. The primary use of suet is to make tallow in a process called rendering, which involves melting and extended simmering, followed by straining, cooling and usually a repetition of the entire process. Unlike suet, tallow can be stored for extended periods without refrigeration. It is used to make soap, for cooking, as a bird food, and was once used for making candles.