Place all the ingredients in a small spot, together with 1 1/2 cup of water. Place the heat on medium-high and bring to a boil, stirring frequently to avoid clumping. Cook until the sauce begins to thicken (about 3 more minutes).
Pour into an airtight container and store in the refrigerator. Your vegan pumpkin spice syrup should last about 7 to 10 days. Make sure to give it a good shake before using!