Irish coffee may not be considered halal (forbidden) according to Islamic dietary guidelines, since its primary component, Irish whiskey, violates these guidelines and therefore must be avoided by Muslims adhering to Islamic dietetic standards. Alcohol is forbidden under Koranic teachings so any drink containing alcohol would also be considered forbidden; however there are various alternatives which allow Muslims to enjoy its rich and creamy flavors without breaking religious law – one such option would be substituting whiskey with non-alcoholic whiskey-flavored syrup that gives similar flavors while adhering strictly with Islamic dietetic guidelines halal rules.

Non-alcoholic whipped cream can also provide the same creamy texture of traditional Irish coffee.