Combine ice cream and coffee granules, stirring until coffee granules dissolve. Spoon 1/4 cup ice cream mixture into each of 6 (8-ounce) parfait glasses. Drizzle each serving with 1 teaspoon brewed coffee. Repeat layers, ending with ice cream mixture. Cover and freeze until firm. Just before serving, top each parfait with 1 tablespoon whipped topping and 1/8 teaspoon cinnamon.