If only mixing a drink would deliver an "O", right guys? Well, either way... this is a tasty beverage. Reminds me of a White Russian, but with a better name.
1 ounce vodka
1½ ounce Baily's Irish Cream
½ ounce Kahlua cofee liqueur
Pour first vodka, then Bailey's, then Kahlua into a cocktail glass over crushed ice. Stir.
Caution: use only high quality vodka such as Grey Goose. Cheap vodka can cause the Bailey's to curdle. Test your brand of vodka by mixing 1 Tsp each of vodka and Bailey's first.