I just used a ratio 2 sticks of butter to 1/2 oz of shake. I used a small crock pot, and let it crock overnight. The butter came out an olive drab color, and actually, I think I overcooked it. It smelled a little like burnt popcorn a little but my friends say they don't notice.
I made some fruity pebble treats last night with it per the recipe on the box and they have very little weed smell to them, but come on very good about 30 or 45 mins after eating them. This is my first attempt. I think next time I make it, I will look for a guide that includes some water, or increase to 3 sticks of butter, to help combat the overcooking.
Seems to work just fine to get the buzz on.