1)Fill a rocks or highball glass with ice.
2)Pour the vodka into the glass. Use a measuring cup, free pour, or pour a portion from a mini bottle.
Mini bottles are 50 milliliters, which is equal to 1.69 fluid ounces. Pour a little more than half of a mini bottle to get about one fluid ounce, and a little more than a quarter of the bottle will be about one half of a fluid ounce. If using one and one half ounces, just pour in the entire bottle and call it even.
3)Pour the Kahlua into the glass. There is no need to stir, but some may prefer to stir the ingredients at this point with a swizzle stick to mix the alcoholic ingredients.
The Kahlua can be poured before the vodka, but even when the Kahlua is poured second it will sink to the bottom of the glass because it is heavier than the vodka.
4)Top off the glass with half and half or milk. The drink is usually not stirred after adding the half and half or milk, as the alcoholic ingredients, especially the Kahlua, should rest on the bottom of the glass. The dark Kahlua should be evident on the bottom of the glass, and contrast with the milk. The vodka will not be apparent, as it is clear, and it will mix some with the milk.
5)Garnish with a single maraschino cherry if desired. The cherry can be rested on the surface of the drink itself, and will be supported by the ice cubes that are in the drink. A stemmed cherry that has not been speared with a toothpick is desirable.
6)Serve the drink with a cocktail straw if desired. The straw will enable the alcoholic ingredients to be sipped from the bottom of the drink, or the drink can be stirred if desired.