Grenadine is what gives the Shirley Temple its signature sweetness and tangy flavor - in addition to that classic pink color. Without grenadine, a Shirley Temple just wouldn't be the same. So, if you want the real deal, be sure to add a splash of grenadine to your next Shirley Temple! But if you're in a pinch, cherry syrup or raspberry syrup can work. You can also make your own grenadine with pomegranate juice. Or make a simple syrup and add a couple drops of red food coloring.