To make a Dirty Shirley cocktail, follow these steps:
- Fill a glass with ice.
- Add 2 ounces of vodka and 1 ounce of grenadine syrup.
- Top with about 4 ounces of lemon-lime soda (such as Sprite or 7UP).
- Garnish with maraschino cherries. Optionally, add a wedge of lime for extra flavor.
This cocktail is essentially an adult version of the Shirley Temple with the addition of vodka for a kick. Some variations include adding a splash of lime juice or using cherry-flavored vodka for more intense cherry flavor. Make sure to use plenty of ice to keep the drink cold and serve it immediately to maintain the soda's fizz.