2 ounces Irish whiskey
1 ounce Lillet blanc
1/4 ounce Cointreau
2 dashes orange bitters
Garnish: orange twist
Stir with ice, strain into a cocktail glass
Source: David Wondrich (~2005)

Necessity can often be a wonderful inspiration. David Wondrich created this drink several years ago when he wanted to bring a bottle of pre-mixed Manhattans to a gathering of friends on Halloween. But his liquor cabinet was missing a few critical ingredients. So using what was at hand, he crafted together a drink which focused on Jameson and Lillet, and the "Weeski" was born.