Combine all ingredients in a blender and blend at high speed until smooth. Serve in chilled champagne saucer garnished with bittersweet chocolate shavings.
Champagne Saucer
In a shaker half-filled with ice cubes, combine the brandy, vermouth, creme de menthe, orange juice, and grenadine. Shake well. Strain into a cocktail glass. Pouring slowly and carefully, float the port on top.
Cocktail Glass