In a cocktail shaker filled with ice, add these ingredients. Shake well, until your hand begins to freeze to the shaker. Strain into a coupe or martini glass. Garnish with a lemon wedge, twist, or Luxardo cherry.
If you want to jazz this up a little, add a dash of bitter before shaking. You can also substitute the cognac for brandy or even bourbon if that's more your speed (aka what you have on hand).