Cut the butter into small pieces and melt it in a heavy bottom saucepan.
Once melted lower the heat and let it simmer. In the beginning, there will be a good amount of foam on top, as time goes foam will starts to disappear.
After 15 minutes, you will notice the bubbles will be clear, very tiny and foam disappears completely.
In less than a minute, you will notice the foam will re-appear and start to rise in the pan.
Turn off the stove, let the foam settle down for few seconds.
And strain the ghee in glass or stainless steel jar.