To make about 1 cup of cannabis-infused butter or oil, you will need:
• 1 1/4 cups unsalted butter or cooking oil of your choice
• 1 oz. average-to-high quality trim or low-quality dried bud; or 1/2 ounce average-quality dried bud
• About 4 cups water
Why Include Water as an Ingredient?
Water ensures the cannabis will never reach a higher temperature than the boiling point of 212 degrees F. Chlorophyll and terpenes—the parts of the plant that give it its flavor and color—are water-soluble. In practical terms, this means a lot of unwanted herbal flavor and green color can be flushed away with the water after cooking, instead of infusing them into the finished marijuana butter or oil. Using water won’t eliminate green color and herbal flavor, but it can reduce it. Without water in the mix, the plant material tends to absorb too much of the butter or oil. This means usable product
... read more at: https://www.freedomleaf.com/cannabis-butter-oil-recipe/