yes sadly that is one think SW do not have on their site, but desperately need, I have asked them on twitter if they could look into making one, but never got a reply.
I have heard though that their website is having a total revamp, so I really hope they bring it up to date and bring lots of new features to it.
What I tend to do when building recipes, is keep my syns list nearby in my kitchen, so if I am adding something that is not a free food, then I will write down how many syns and then I add it up and divide by the portions.