How much ingredients will you need to make a gallon of shirley temple drinks?

To make a gallon of Shirley Temple drinks, you'll need approximately 12 cups of Ginger Ale or lemon-lime soda, 1 cup of grenadine syrup, and the juice of about 4-6 limes for added flavor. You can also garnish each serving with maraschino cherries and orange slices. Adjust the proportions to taste, especially if you prefer a sweeter or more tart drink.