Add the water, brown sugar, and chai spice blend to a small saucepan. Whisk well until the sugar has dissolved.
1 cup water, 1 cup light brown sugar, 2 tbsp homemade chai spice mix
Bring to a boil on medium/medium-high heat, stirring frequently.
Once the mixture reaches a boil, immediately turn down the heat and let the syrup simmer for about 10 minutes (at about 190°- 200°).
Once you are satisfied with the consistency of the syrup, immediately remove it from the heat and pour it into a heat-safe jar or container.
Allow the syrup to cool for a few minutes. Then, add the vanilla extract and stir well (optional).
2 tsp vanilla extract
Let the syrup cool completely, then enjoy! Store in an airtight container in the fridge.