Believe it or not, this accumulating foam contains separated milk solids that are surprisingly loaded with flavor. Since clarified butter doesn't require browning, ghee and clarified butter are ...

Make enough attempts to cut foam using whatever you’ve got — utility knife, hacksaw, serrated plastic knife — and you’ll wish hard for something that cuts cleaner, faster, and better.

It will start to form brown bits as it caramelises. Let the butter foam away until it is a deep, caramel-brown colour and starts to smell delicious and nutty, then remove immediately from the heat ...

Be sure not to let the butter foam for too long as by the time you have cooked the sandwich for two minutes on each side the butter will be burnt.