Simple syrup is just granulated sugar and water that is combined together over heat until the sugar melts and becomes syrupy. It is used to flavor cocktails, lemonade, sorbets, frosting, candies and more. 

To make a simple syrup, combine equal parts granulated sugar and water in a saucepan over low heat. Stir until the sugar dissolves. Bring to a boil and cook for 1 minute without stirring. Let cool and either use immediately or store in a glass jar in the refrigerator. Simple syrup will keep indefinitely.