can you parse from regular recipes found in blogs and websites?
I can, but not as well. All you have to do is highlight the ingredients then click the bookmarklet. I parse out your selection into the ingredients if there's some kind of delimiter in there (coded, like tags or line breaks). The recipe name just takes from the title of the page.
So I normally copy the title of the recipe into my clipboard, highlight the ingredients, then click the bookmarklet. You can then paste in the recipe title and you're good to go.
It works surprisingly well for most sites.