That's like the most appealing thing about vaporizer's... The fact that they get the most THC out using a heated method, And because you aren't burning it to ash you can use it to bake with. The amount of butter is really all up to you, Decide how much of the baked goods you want to make, then use as much butter as the recipe calls for, Unless you want to have left over butter, and of course the more you want to make, the less of the potency they'll be, so keep that in mind, A half ounce would be good for 8 - 16 cookies depending on how strong you want them, Hell the stronger the better in my opinion, You can always just eat a little piece, Which is recommended by the way, then increasing the dosage to get the effects desired, of course me being the way I am I'd eat three off the bat and hope I don't get sick, But hey, Do as you wish