The 21st Century is a clever twist on the much-older Twentieth Century cocktail, with tequila and absinthe taking the place of gin and white wine apéritif.
NY TIMES
The COCKTAIL
The 21st Century is an odd combination, but when it’s in perfect balance; like good health, it’s a beautiful thing.
The Recipe
What you need 2 oz tequila blanco ¾ oz light Creme de Cacao ¾ oz lemon juice ¼ oz Absinthe
What you do Rinse a chilled cocktail glass with absinthe (or anise liqueur): POUR the absinthe into the glass, swirl it around, and discard (or drink). Then SHAKE the remaining ingredients with ice, and STRAIN into the rinsed glass.
Patrick (Paddy) Moore 
