Add all ingredients, except for the ginger beer, into a cocktail shaker filled with ice.
Shake well, about 20 seconds. Pour into a lowball glass filled with ice.
Top the glass off with the ginger beer and stir to incorporate.
Optional - Add another small splash of pomegranate juice on top for spooky dramatic effect.
Notes
*If you can't find a pomegranate Margarita mixer, add in another 1/4 oz of pomegranate juice and another 1/4 oz of cinnamon simple syrup.**It's super easy to make your own cinnamon simple syrup. Here's a recipe.