What's in it? Vodka, Kahlua, Baileys Irish Cream, actual cream.
What's it tastes like? Like blowing bubbles into chocolate milk as a four-year old, the cognizance of which you will have after drinking three of these.
Why should you order it? Because it's a dessert masquerading as a drink. It's like coffee-flavored ice cream. In a glass. With booze.