In a small saucepan, add the water, sugar and optional pumpkin puree. Bring to a boil then remove it from the heat and stir in the spices.
Let sit until completely cool, about 30 minutes. Strain through a fine mesh strainer to remove the spices then store in an air tight container in the refrigerator for up to weeks.
Notes
Use 2 Tablespoons of pumpkin spice syrup for one grande pumpkin spice latte
*Substitute half of the granulated sugar for unpacked brown sugar for a deeper, more autumnal flavor.
**See section above about adding in the optional pumpkin puree and why you may or may not want to.