He used vaporized bud? yuk. very yuk.

If you're vaping your bud properly, you shouldn't have much left in it.

I use about half trim and half good crystally bud. same ratio 1oz:1lb butter

However, for tastier butter I rinse my herb first:

in the crocpot I pour about 2 cups of boiling water over the herb. Let sit 1 hour and pour off. repeat once. Then add butter and process as above.

I use the crocpot on high and let it work all day and over night.

I prefer using coconut oil. It keeps longer.

I often throw in the herb left over from bubble extraction. I get what's left of the resin glands and all the other oil-extractable beneficials left behind in the green.