Place the brewed coffee and sugar in a small saucepot over medium-high heat.
1 cup brewed Red Diamond coffee, 1.5 cups granulated sugar
Bring to a boil while stirring constantly. Once at a boil, continue to stir and boil for three minutes, then remove the saucepot from the heat. Allow the syrup to cool slightly before placing it in a container in the refrigerator. It will keep for up to a month.