If It's Good Enough For A Grand Duke

Grand Duke Alexei Alexandrovich of Russia to be exact. I tried this glorious cocktail over the weekend but I tweaked the presentation just a bit. A stemless martini glass did the trick beautifully. But for the life of me, I couldn't find any Chartreuse. Maybe next time...wanna join me?

Grand Dukes Nectar
2 oz (60 cl) Brandy
1 oz (30 cl) Jamaican Rum
2 tsp (1 cl) Chartreuse
1 Tbls (1½ cl) Cold Black Tea
1 oz (3 cl) Champagne
1 tsp (½ cl) Sugar
1 tsp (½ cl) Lemon Juice

Instructions: Combine all ingredients, except the champagne, into a shaker with fine ice. In a tumbler add the champagne. Shake the other ingredients and pour into tumbler with Champagne, stir. Garnish with orange twist.