Place blackberries in the cocktail shaker and muddle until they release their juice.
Add vodka, lemonade, and simple syrup to the shaker.
Fill the shaker with ice and shake for 15-20 seconds.
Fill a Collins glass with fresh ice.
Strain the mixture through a fine-mesh strainer into the glass.
Garnish with fresh blackberries and a lemon wheel.
Notes
The drink works best with fresh blackberries, but frozen ones can work in a pinch. Just thaw them first.Store-bought lemonade is fine, but fresh-squeezed makes a big difference in taste.For a sweeter drink, add more simple syrup in 1/4 oz increments.Keep the garnish simple - too many berries can make the drink hard to sip.This recipe makes one serving. Double or triple the ingredients to make a pitcher for parties.