Duos and trios are a family of mixed drinks. A duo contains a spirit and a liqueur; a trio additionally contains a creamy ingredient, commonly cream or Irish cream. This family of drinks is named in Gary Regan's The Joy of Mixology. There is much variation in their ingredients, but their defining feature is that they are sweet due to their liqueur content.
A "B and B" is made from equal parts of cognac and Bénédictine. It is typically served on the rocks, but may also be served straight. The producers of Bénédictine market this cocktail ready-mixed under the label "B & B." Chris Robinson of the Black Crowes mentions "B & B and a little weed" in the song "Bad Luck Blue Eyes Goodbye."
Brave Bull
A Brave Bull is made by mixing tequila and Kahlúa.
A Rusty Nail is made by mixing Drambuie and Scotch. Many prefer less Drambuie to decrease the sweetness of the drink. Scotch has a fairly biting and hot taste that is counterbalanced by the honeyed, herbal overtones of the Drambuie. A Rusty Nail can be served in an old-fashioned glass on the rocks, neat, or "up" in a stemmed glass. It is most commonly served over ice. A Rusty Nail served without ice is sometimes called a Straight Up Nail. The Canadian version of this drink is called a "Donald Sutherland" and substitutes rye whiskey for Scotch.
Trios
;ABC: Amaretto, Bailey's, and cognac. ;Alexander: Equal parts gin, crème de cacao, and half and half, mixed in a cocktail shaker with ice, and poured into a cocktail glass and sometimes topped with gratednutmeg or cinnamon. The Alexander is the ancestor of the Brandy Alexander. ;Bloody Aztec: Tequila, crème de cacao, cream and red food coloring ;Brandy Alexander: Cognac, dark crème de cacao and cream or half and half. ;Chocolate Martini: Vodka, crème de cacao, and cream or half and half ;Colorado Bulldog /.357 / Bev Dog: Vodka, coffee liqueur, cream, and a splash of cola, optionally garnished with hazelnuts ;Dirty White Mother: Brandy, coffee liqueur, and cream. ;Duck Fart:Whiskey, coffee liqueur and Irish cream. ;Godchild / Goddaughter: Vodka, amaretto and cream or half and half ;Muddy Water / Blind Russian: Vodka, coffee liqueur and Irish cream. Add cream to get a Mudslide. ;Panama: Cognac, white crème de cacao and cream; garnish with nutmeg if desired. The drink was popular during the early 20th centuryhttps://www.whygo.com/panama/panama-cocktails.html. It is sometimes confused with the Brandy Alexander, which is made with dark instead of white crème de cacao. ;White Russian: Vodka, coffee liqueur, and cream.
