Add all the ingredients except the cream in a metal steaming pitcher. Let sit for a few seconds while the nitro from the beer dissipates. Steam with a milk steamer until the temperature reaches 170?F.
Pour into an Irish Coffee mug, and top with the whipped cream.
Garnish with a cinnamon stick.
*Coffee-infused Teeling Small Batch Whiskey: Mix 10 grams instant coffee with 750mL Teeling Small Batch Whiskey.
**Brown sugar coffee syrup: Heat 2 cups water, then add 2 cups dark brown sugar and 1 tbsp instant coffee.