Place butter in a medium sauce-pan over low heat and melt.
Simmer until the surface is completely coated with foam. Take care not to let it brown.
While simmering, skim off the foam as it rises to the surface until completely clear.
Add all the remaining ingredients. Continue cooking on low heat for about 15- 20 minutes. Pass it through a cheese cloth or sieve . It is now ready to be used . It can be stored in a tightly covered container for about a month in the fridge.