This New Orleans favourite has only recently been added to The Matthews' canon, and is rapidly establishing itself as a regular.
Originally, this was a brandy-based drink. However, a worldwide shortage of brandy in the 19th century due to a crop-ruining epidemic of phylloxera, meant the good people of New Orleans had to improvise and use widely-available rye whiskey instead.
Using absinthe to wet the serving glass is key; it provides the aroma of aniseed/wormwood, without imposing the flavour on the liquid.
Traditionally served without ice, so it's worth chilling the serving glass before serving, to keep the drink at optimum temperature.
Or just serve with ice. It is, after all, your drink.