Each flavored syrup recipe makes 6 tablespoons -- enough for two servings of our Colorful Cows.
Stir together blueberries and sugar in a small saucepan over medium heat. Cook, stirring occasionally, until sugar dissolves and berries release their juices, 10 to 12 minutes. Strain syrup (do not press down on berries); discard solids. Refrigerate until cool.