This Dirty Shirley is a single serving cocktail, a grown-up version of the classic Shirley Temple made sweet and cherry-red with grenadine. Mix one in minutes, or scale it up for a small batch.
Add the grenadine and stir until the color is an even red.
Fill the glass to the top with ice.
Pour the lemon-lime soda over the ice.
Stir gently to combine.
Garnish with maraschino cherries and a lime slice, if desired.
Video
Notes
Fill the glass with plenty of ice. A glass packed with ice stays colder and melts more slowly than a few cubes would, so the drink waters down less as you sip.Pour the lemon-lime soda in last and stir with a light hand. Adding the soda at the end protects the carbonation, so the drink stays fizzy instead of going flat.Chill the vodka, grenadine, and soda ahead of time, especially for a small batch. Cold ingredients mean less ice melts into the glass, so the flavor holds and the drink doesn't get watery.Measure the pours instead of eyeballing them. The 2-to-1 ratio of vodka to grenadine is what keeps it balanced, so a jigger or measuring cup gives you the same drink every time.