Cube butter and add to your sauce pan.
Turn heat to low and allow the butter to melt. Do not stir!
After the butter has melted, periodically skim the foam from the top of the ghee until it stops foaming. This may take a few hours.
After skimming the foam, look at the milk solids forming on the bottom of the pot under the ghee. For milder ghee, it will be done with these solids are lighter. For nuttier ghee, allow the solids to darken.
When the milk solids are cooked to your preference, prepare your jar by placing the funnel, strainer, and cheese cloth over the jar.
Allow the ghee to cool for 5 minutes to ensure the glass jar won't break.
Pour the ghee through the cheese cloth & strainer into the jar. If poured slowly, the milk solids will remain at the bottom of the pot.