1. Pour syrup into 20-ounce chilled stainless steel pitcher. Add cold milk.
2. If using a stove-top, heat syrup and milk in saucepan over medium-low heat; do not boil. If using a microwave, heat milk and syrup in large, shallow bowl for 2 to 3 minutes. Whisk rapidly until milk is airy and frothed. Blend in coffee, dust with cinnamon and serve in a bowl or mug.