Melt 225 g/8 ozs/1 cup butter gently in a saucepan or in the oven. Allow it to stand for a few minutes, then spoon the crusty white layer of salt particles off the top of the melted butter. Underneath this crust there is clear liquid butter which is called clarified butter. The milky liquid at the bottom can be discarded or used in a white sauce.
Clarified butter is excellent for cooking because it can withstand a higher temperature when the salt and milk particles are removed. It will keep covered in a refrigerator for several weeks.