My recipe has not a lot of basis in science, and this is just a personal anecdote of a recipe that works for me: Break your bud up! Then, soak it for a few day

My recipe has not a lot of basis in science, and this is just a personal anecdote of a recipe that works for me: Break your bud up! Then, soak it for a few days in water (distilled, preferably) in a covered container. Then, before you make cannabutter out of it, blanch your weed (bring to a boil, then put it into ice water). This will take most of the flavor out of it. Strain all the water out. The rest of the process is as usual - Decarboxylate your herb by baking it at 240F for ~45 minutes, mixing it up every ~10m so it doesn't burn or toast unevenly. Then simmer it with butter and water for like 4 hours. If you have a thermometer, make sure the temperature stays under 180F. After 4 hours, strain all the butter thru a cheesecloth or whatever strainer you have, and discard the solids. You'll be left with a reasonably flavorless butter you can use in any sort of cooking :)