Coffee prepared by adding steamed hot milk (microfoam) to espresso so that the flavour is brought out and the texture is unusually velvety. It has less milk than a latte but both are varieties of coffee to which the milk can be added in such a way as to create a decorative surface pattern. Such effects are known as latte art. Coffee can also be incorporated with alcohol to produce a variety of beverages: it is combined with whiskey in Irish coffee, and it forms the base of alcoholic coffee liqueurs such as Kahlúa and Tia Maria. Darker beers such as
Pumpkin Spice Latte messaging. Starbucks has written that their target market represents the demographics using social media most heavily, including on Twitter, Facebook, and Instagram. In 2013, the company added a gaming element to the drink's arrival, allowing customers to "unlock" the drink at Starbucks stores nearby by ordering the drink with a code before its official sale date. Between August 2012 and January 2014, there were over 29,000 tweets with the hash tag "#PSL", and in a single fall day use of the PSL hash tag exceeded 12 million. Since the introduction of the Starbucks Pumpkin Spice Latte, other companies have created