Originally Posted by salt and pepper
The alcohol cooks out in the cooking process, you can also use grape juice as a sub.
True about the grape juice.
However, according to the USDA, alcohol retention is pretty high using most cooking methods.
For example, alcohol: stirred, baked, simmered for 1 hour still retains 25% of the alcohol. If cooked for 2.5 hours, 5% alcohol is retained.
Is this a problem for most folks? No.
But for alcohol sensitive people and recovering alcoholics....better safe than sorry.
Here is the USDA chart of Nutrient Retention
It includes nutrient retention for a very wide range of foods. You will have to scroll down a ways to find alcohol.