Add the water and sugar into a saucepan and gently heat up the mix while stirring.
1 cup Water, ⅔ cup White sugar, ⅓ cup Demerara sugar
Stir until the sugar is completely dissolved.
Add cinnamon sticks to the saucepan and reduce the heat.
5 Cinnamon sticks
Cover the saucepan and let the mix simmer for 5 to 10 minutes.
Then remove the saucepan from the heat, cover the syrup, and let it cool down.
Ideally, let the mix infuse for 6 hours or even more. If you're in a rush, you can make it one hour only. But that's the absolute minimum. And be aware that the longer you let the cinnamon infuse, the better the results will be.
Finally, remove cinnamon sticks and stir in the vanilla extract before bottling.
½ tsp Vanilla extract
For that extra kick of cinnamon, add one or two cinnamon sticks to your syrup bottle.