I have wine in my house still that I use for cooking. I don't do it often and when I do I have to be very vigilant about it. My AV starts chirping in my ear "just have a taste" and I make a point of holding the bottle away from me so that I don't even get a smell of it. If I were in a more fragile mood at the time I'm not sure I would stand up to it, so I don't tempt fate often. I am better with my steak and ale pie because I was never an ale drinker (beer yes, ale no) and I can buy just the one can that I need for it. So long story short, I don't think the alcohol in the food is a problem but the temptation of the alcohol before it gets into the food can be a problem.