Alcohol added to a recipe may cook off, but it depends on how long you cook it. Rena Cultrufelli of the USDA prepared the following table of alcohol content in cooked foods.
Preparation Method Percent Retained
Alcohol added to boiling liquid and 85%
removed from heat
Flame 75%
No heat; stored overnight 70%
Baked, 25 minutes, alcohol not stirred 45%
into mixture
Baked/simmered, alcohol stirred into mixture:
15 minutes 40%
30 minutes 35%
60 minutes/1 hour 25%
90 minutes/1.5 hours 20%
120 minutes/2 hours 10%
150 minutes/2.5 hours 5%
So you see not all the alcohol is ever complete “burned” off.
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