In a small saucepan, bring the brown sugar and ¼ cup (60 ml) of water to a simmer over medium-low heat. Once simmering, stir to combine, then keep cooking, stirring constantly, until the liquid thickens enough to coat the back of a spoon. Set aside to cool.
Meanwhile, in a large pot, bring 8 cups (1.9 L) of water to a boil.