Apple Custard Martini

Ingredients
40mL VOK Advokaat
30mL Dark Rum
10mL Vanilla Syrup
30mL Cloudy Apple Juice
Methods
Shaken
Sprinkle cinnamon and sugar together on a plate. Dip the rim of a chilled Martini glass into the sugar. Add all ingredients to a Boston glass and shake with ice. Strain liquid into the rimmed Martini glass.