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This will help the syrup to thicken. It should have a golden brown color, like the color of Grade A maple syrup.
Boil the water in a medium saucepan. Lower the heat to medium and stir in the sugar, stirring with a wooden spoon until the sugar has dissolved. Add the vanilla extract and boil for another 3 to 5 minutes. Set the saucepan aside and allow the syrup to cool. Pour the syrup into a 1/2-Liter jar that has been sterilized. Store the syrup in the refrigerator as needed.