It is good - I'm not kidding about it never lasting. If it isn't finished in one sitting, leftovers disappear by the next afternoon!

You're calling it precisely measured because you haven't seen what it looks like in practice - a scoop of white sugar, a scoop of brown, sure, we'll call that a tablespoon... (The 1/2c butter is the only consistently precise measurement, by virtue of a half cup being a standard stick of butter.) :)