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Then place the glass bowl over it so it sits over the pan. Do not let the glass bowl sit into the water as the temperature will be too high. Once water is boiling, change heat to medium-low and place butter into the bowl. Continue to stir for at least an hour. Note: make sure the marijuana has been lightly ground. This should filter all the leftover marijuana out. Make sure to get as much of the liquid out of the cheesecloth to gain more yield. Once all the liquid is extracted, freeze for 40 minutes. this should remove any excess water from the butter. Once the water is removed, the butter is complete and ready to be added to the brownie mixture.

Summary:
Fill the large pot with water and boil. Add 1 cup of water, and 10 grams of marijuana into the bowl once the butter is melted. Place the cheesecloth over the aluminum pan and pour the butter mix into the pan. Remove the pan from the freezer after 40 minutes and poke a hole on the bottom of the pan.