There has just been a research paper published on this exact thing - 
studying alcohol content in mothers using traditional recipes in China, 
that use a lot of cooking alcohol.  Study was newborns.

Very low levels or risk recorded.  I'm sure the link was posted in here, 
just in the past three weeks - archives?  It may be this one...

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T40-4K07693-4&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=e17e3b2f85373f75888914e16ebb4f32#

Morgan Gallagher

Dawn Staudt-Vanek wrote:
> I teach a pre-natal breastfeeding class. I had a Vietnamese couple, very 
> motivated to breastfeed. Dad's one big concern was that mom's family would 
> be cooking foods for her post-partum that utilize alcohol in the cooking. He 
> wanted to know how long alcohol needed to be cooked before it wouldn't 
> effect mom or baby.
>   

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