For reference, 1 shot glass = 1.5 fluid ounces
1.5 fluid ounces vodka
0.75 fluid ounces Khalúa
1.5 fluid ounces espresso (a store-bought version, such as Starbucks, will work)
0.75 fluid ounces simple syrup
Cinnamon sticks or ground cinnamon, for garnish
Add vodka, Khalúa, espresso, and simple syrup to a cocktail shaker. Add a scoop of ice to the shaker, seal the shaker, and shake vigorously for 5 seconds. Use the shaker’s strainer to strain the drink into a martini glass. Garnish with cinnamon sticks or a dash of ground cinnamon.