Use fresh lemon juice. Bottled lemon juice can work in a pinch, but fresh lemon juice gives the drink a brighter flavor.Taste before adding the simple syrup. Cranberry and pomegranate juices can vary in sweetness. You may find that you don't need any additional sweetener.Don't skip the ice. This drink is best served very cold. Add the soda last. The lemon-lime soda provides the carbonation, so adding it after shaking helps keep the drink bubbly.Make it pretty. The pomegranate seeds and rosemary are more than just decoration. The rosemary adds a subtle herbal aroma every time you take a sip.
How to Turn This Into a Cocktail
For an adult version, add 1 to 1½ ounces of rosemary vodka to each serving before topping with lemon-lime soda.If you don't have rosemary vodka, regular vodka works just fine. You could also use a citrus-flavored vodka for another layer of flavor.