Bailey's Irish Cream is a liqueur made in Ireland with Irish whiskey and cream, and additional flavourings. Bailey's suggests a range of serving suggestions, although the proper way to serve the drink has emerged from traditional liqueur practices, as well as legislation in pubs and bars in Ireland and the European Union. Although you can serve Bailey's however you wish, there are conventions that are more proper than others. Knowing these will help you please guests who have traditional tastes.
Pour a large measure of Bailey's, either free hand, or using a measuring glass. The traditional measurement in Ireland and the rest of the European Union is around 75ml, which is equivalent to 2.5 fluid ounces, although you can pour larger amounts if you wish.
Serve Bailey's in a tumbler glass, and ask your guests if they would like ice. It is traditional to serve liqueur after dinner, although you can drink Bailey's at any time.
Make a black coffee if your guests prefer a traditional Irish Coffee instead of Bailey's on the rocks. Pour the coffee in a coffee cup -- traditionally a tall, glass coffee mug -- and add the Bailey's to the top. Hold a small spoon over the top of the coffee and slowly pour the Bailey's onto the spoon. This will cause the Bailey's to float on top of the coffee for a more classy effect.