Is cooking with fruit liqueur comparable to cooking with fruit juice?
Sorry rumtscho that is incorrect. Alcohol will completely evaporate, what does stay "forever" is the flavor the spirit will impart but chemically ethyl is evaporative, to test my posit try wiping some rubbing or high proof vodka on a glass surface and you can actually watch it evaporate. The "How" depends on the recipe in e.g., deserts usually @ the end or in a finishing sauce. You could also make a chutney or in a marinade.

Cheers!

EDG