Start by chilling your martini glass in the freezer.
Fill your cocktail shaker up with ice. It should be almost full to the top with ice
(optional garnish) choose an Orange or Lemon twist.Slice the ends off your fruit.cut the bulk part of the fruit open in one spot and use your knife to remove all of the pulp from the peel.Take the peel and wrap it like a cinnamon roll around your cocktail pick. Pull it off the pick and slice it into four or so pieces. Then, take one piece and wrap it around the pick again, but not overlapping the peel at all. Pull it off the pick and it should stay twisted. Start measuring out your ingredients with your jigger.
Add 2 oz of Courvoisier to your shaker after measuring it with your jigger.
Add .5 oz of Grand Marnier to your shaker after measuring it with your jigger.
Add .5 oz of Orange Juice to your shaker after measuring it with your jigger.
Add .5 oz of Lemon Juice to your shaker after measuring it with your jigger.
Pop the lid onto your shaker and shake well. Shake it until the outside of the shaker is cold to touch.
Remove the lid from your shaker. Add the strainer to the top of your shaker.
Remove your martini glass from the freezer and pour your drink into your glass.