Re: Does something like thsi exist?
recipezaar.com has a function kind of like that, but it will take a day or two for your recipes to show up and they will be public for others to comment on (if that matters).
After they are published you can add them to your shopping list and then it'll list everything you need for that recipe and you can check box the items you have and then print it out.
The only thing I don't like is if you aren't a paid member you can't add other things to the list online, you'd have to print it and then write the other stuff down (not that big of a pita though).
Wife to J, Mama to K
C, born still at 22 weeks our little
and our big mister A