Yes! If you think you won’t be able to use up the homemade syrup in a couple of weeks, you can freeze it. Using an ice cube tray makes for easy-to-use portions (I like putting 1 Tbsp. of syrup in each cube). You may thaw the amount of cubes you need by leaving them at room temperature for a couple of minutes, but you don’t really need them to completely defrost before adding them to your drink.