Thank you :) The regular one is basically just some kind of cream soda with a soft, butterscotch flavored marshmallow fluff on top. It was way too sweet for my taste, though. I think the frozen one is more or less the same, only that the texture is more like a slush drink or a frappuchino. It's less sweet, because of all the ice in it, which sort of 'waters down' the intensity of the cream soda a bit. The foam on top is the same, of course. It's what gives you the nice little butterbeer mustache ;)