Additional Tips

Ghee is clarified butter; that is, butter with the milk solids and moisture removed.  It imparts a unique flavor to curries and has a higher smoking point than many vegetable oils, such as olive.  When cooled, ghee will keep for about a year without turning rancid.  Although some sources say it does not need to be refrigerated, just to be safe we recommend refrigeration.    There are a surprising number of ways to make ghee, including boiling the butter in water, but I believe this recipe is the easiest.  Some people add a curry leaf or bay leaf when cooking for added flavor.  Note: never use salted butter for ghee.