a quarter ounce of some decent heads in two sticks of butter will keep you baked for quite some time.

Fill a large pot with water and start it on its way to boiling. put a smaller pot inside the one with water. Put your butter and herb in the second pot. Congrats, you've made a double boiler. Do this so you don't burn the butter and waste your herb.

Let that simmer away for about 20 mins. Strain it through a piece of chessecloth into a tupperware container. Stick the tupperware in the freezer until your butter has completely set, then move it to the fridge. put it on toast, cook with it, whatever you can think of. It should be a light green color and taste heavenly.

Good luck.