What I have had good luck with is I start with a cookie recipe. Whatever amount of butter needed for the recipe is what I use to extract the cannabinoids. I'll set up a double boiler which is sometimes just one pot floating in another. Heat the butter up to about 70C and place the ground up bud in it. Keep the butter around 70C for 3-4 hours. Filter through a fine sieve as to keep the finer particles in the butter. I would have figured how much bud to use by the amount of cookies the recipe makes.

Make cookies and enjoy!