Freshly grated nutmegor ground nutmeg or ground cinnamon for topping
Make Pumpkin Spice Syrup:
Combine all ingredients in a small saucepan. Bring to a simmer over low-medium heat. Simmer for 15 minutes, stirring occasionally. Do not allow to boil. Remove from heat then let it cool to room temperature.
If using whole spices, drain mixture through a fine-mesh sieve to remove the solids. Transfer syrup to a lidded jar or bottle. Keeps, refrigerated, for one month. Shake before using.
Make Pumpkin Spice Iced Coffee:
Fill a tall glass with ice cubes. Add coffee concentrate, water if using, creamer of choice, and pumpkin spice syrup. Stir. Sprinkle nutmeg and/or cinnamon over the top.