1/2ozGrand Marnier or Triple Sec or any orange liqueur
a few dashes of Angostura bitters
Peel out little strands from the mandarin, for the garnish. Peel the mandarin completely and muddle it well in a cocktail shaker. Fill it halfway through with ice and add the Bourbon, Grand Marnier, Vermouth and bitters to it. Shake well.
Strain into a glass filled with crushed ice. Garnish with mandarin strands. Serve immediately.