Roughly dice the butter into large chunks

Place the butter in a deep saucepan and place over low heat.

Gently simmer for 30-60 minutes, stirring often, until the liquid is clear, the foam has subsided and all of the solids have browned and fallen to the bottom. Be careful to not let it burn!

Strain the liquid through fine cloth into a heat-proof jar.

Allow to cool before using. Be very careful with the entire process as it is very hot while molten!