Shake ingredients with ice and strain into a cocktail glass.
To make the garnish: hold a 3cm round piece of orange zest about 10cm above your cosmo and very carefully wave it over a lit match or lighter flame. Bend the outer edge of the zest in towards the flame so that the orange oils are released, then drop the zest into your drink.
3 twists on the cosmo1. Champagne cosmo: Add a splash of champagne to the finished cocktail, then stir gently and serve.
3 twists on the cosmo2. Blue cosmo: Substitute blue curaçao for triple sec and Ocean Spray white cranberry juice for the usual red. Some blue curaçaos are quite sweet, so you may want to up the lime a little.
3 twists on the cosmo3. Tequila cosmo: Replace the vodka in your usual cosmo with a good quality, 100% blue agave tequila like Ocho or Olmeca Altos.