Begin by taking your vanilla beans and slicing them lengthwise with a sharp knife. This will help release their aromatic seeds and infuse your syrup with maximum flavor.
In a small saucepan, combine the filtered water, granulated sugar, and brown sugar. Add the split vanilla beans (and the seeds if you wish) to the mixture.
Place the saucepan over medium heat. Stir the mixture until the sugars dissolve completely and the syrup begins to simmer. Avoid boiling the syrup, as this can alter the flavor.
Once the mixture reaches a simmer, reduce the heat to low and let it simmer for about 5-10 minutes. This will allow the flavors to meld beautifully.
After simmering, remove the saucepan from the heat. Let the syrup cool for a few minutes. Once cooled, strain the syrup into a glass jar or bottle, discarding the vanilla beans.
Seal your jar or bottle and store it in the refrigerator. Your homemade vanilla syrup will keep for about 2-3 weeks, ready to enhance any beverage you desire!