Place the sugar in a bowl along with the coffee concentrate and water.
1 tablespoon sugar, ½ oz water, ¾ oz cold brew concentrate
Use an electric whisk or mixer to whip the mixture. This could take several minutes until it foams up nicely.
Set the foam aside while you mix the rest of the drink.
Measure the bourbon, liqueur, infusion and bitters into a cocktail stirring glass or other heavy-bottomed glass.
1 ½ oz Maker’s Mark Bourbon, ½ oz Licor 43, ½ oz cinnamon vanilla infusion, 3 dashes chocolate bitters
Add ice to the glass and stir 20-30 times to dilute.
Strain the mixture into your serving glass.
Carefully pour the foam on top of the rest of the mixture.
Garnish with ground cinnamon on top or a cinnamon stick and serve immediately.
Cinnamon stick or ground cinnamon for garnish
You can make your own Cinnamon Vanilla infusion by letting a few cinnamon sticks and vanilla beans soak in vodka. Make sure they are completely covered with the liquid, and let it sit for a couple of days before straining out the cinnamon and vanilla. Store it in a tightly sealed bottle.