Pour water, granulated sugar brown sugar, vanilla and cranberries into a medium saucepan and bring to a boil

Once boiling, reduce heat and let simmer for approximately 15 minutes, you will see that the cranberries have opened and the mixture will thicken

Strain mixture into a bowl, use a thick spatula and press down to starin as much as the cranberry juice you can

Place syrup into mason jars and place mason jars into the fridge to cool before using. Syrup will thicken more once cooled